CUET UG Economics Booster Test 3 - Production Fundamentals -

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CUET UG Economics Booster Test 3 - Production Fundamentals

⏱️ 30 Minutes

❓ 20 Questions

📌 Answers are locked once submitted — results and explanations appear at the end.

CUET UG Economics Booster Test 3 - Production Fundamentals

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QUESTION 1 OF 20

Which of the following analytical assumptions simplifies the standard model of input transformation as introduced in the text?
1. The objective of the firm is limited strictly to cost minimization without regard to profit.
2. No time elapses between the combination of inputs and the production of output (instantaneous production).
3. The firm only produces output for immediate final consumption by consumers.

Answer Review

1 Which of the following analytical assumptions simplifies the standard model of input transformation as introduced in the text?
1. The objective of the firm is limited strictly to cost minimization without regard to profit.
2. No time elapses between the combination of inputs and the production of output (instantaneous production).
3. The firm only produces output for immediate final consumption by consumers.

A 1 and 2 only

B 2 and 3 only

C 1 and 3 only

D 2 only

💡 Short Explanation

�� The simple production model assumes instantaneous production. �� Firms aim to maximize profit, not merely minimize cost. �� Output may be goods or services and is not limited to immediate consumption.

✅ Correct Answer Explanation

In the NCERT production model, one simplifying assumption is that no time elapses between combining inputs and producing output. This assumption makes the production process easier to analyze. Statement 2 is correct because the model assumes instantaneous production. Statement 1 is incorrect because the firm's objective is profit maximization, not merely cost minimization. Statement 3 is incorrect because firms may produce goods or services for various purposes, not only for immediate final consumption. Therefore, Option D (2 only) is correct.

❓ Why Other Options Are Incorrect

�� Option A → Statement 1 is incorrect because firms maximize profit rather than only minimizing cost.
�� Option B → Statement 3 is not an assumption of the production model.
�� Option C → Both Statements 1 and 3 are incorrect.

🎯 Strategy

Used

Option Grouping

Application:

Evaluate each statement individually and eliminate options containing incorrect assumptions.

Final Logic:

Only Statement 2 represents an NCERT simplifying assumption.

🧠 Memory Trick

Simple Model = Instant Production

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Simplifying Assumptions of Production

2 Assertion (A): A domestic helper producing 'cleaning services' is conceptually engaging in the same economic process as a car manufacturer producing cars.
Reason (R): Both are examples of acquiring and transforming inputs (like labour and materials) into an output.

A Both A and R are true and R is the correct explanation of A.

B Both A and R are true but R is not the correct explanation of A.

C A is true but R is false.

D A is false but R is true.

💡 Short Explanation

�� Production includes both goods and services. �� Both activities transform inputs into output. �� The Reason correctly explains the Assertion.

✅ Correct Answer Explanation

Production in economics refers to transforming inputs into outputs, regardless of whether the output is a good or a service. A domestic helper combines labour and simple tools to produce cleaning services, while a car manufacturer combines labour, capital and raw materials to produce cars. Although the outputs differ, the underlying economic process is the same. Therefore, both the Assertion and the Reason are true, and the Reason correctly explains the Assertion. Hence, Option A is correct.

❓ Why Other Options Are Incorrect

�� Option B → The Reason directly explains why both activities are production processes.
�� Option C → The Reason is true.
�� Option D → The Assertion is also true.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Compare the economic process involved rather than the type of output produced.

Final Logic:

Goods and services are both produced by transforming inputs into outputs.

🧠 Memory Trick

Goods + Services = Production

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Meaning of Production

3 While a firm may realistically require any number of different inputs to produce output, the analytical model simplifies this by considering a firm that produces output using only _________ factors of production.

A Primary and secondary

B Three interchangeable

C Two specific (Labour and Capital)

D Fixed and monetary

💡 Short Explanation

�� Real production uses many inputs. �� The analytical model assumes only labour and capital. �� This simplifies economic analysis.

✅ Correct Answer Explanation

Although firms normally employ many inputs such as land, labour, capital, entrepreneurship and raw materials, the NCERT analytical model simplifies production by assuming only two factors of production—Labour (L) and Capital (K). This simplification makes it easier to study production functions, isoquants and returns to scale. Therefore, Option C is correct. Option A is not an accepted classification in the production model. Option B is incorrect because the model does not assume three factors. Option D is incorrect because "fixed and monetary" are not the two factors used in the production function.

❓ Why Other Options Are Incorrect

�� Option A → Primary and secondary are not the two analytical inputs used in the production function.
�� Option B → The model does not assume three interchangeable inputs.
�� Option D → Monetary resources are not treated as a production factor in the two-input production function.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Recall the standard production function notation q = f(L, K) used throughout NCERT.

Final Logic:

Simplified Production Function = Labour + Capital.

🧠 Memory Trick

L + K = Production Model

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Two-Factor Production Function

4 Arrange the sequence connecting resource acquisition to firm profitability:
I. Output is sold in the market.
II. The difference between revenue and cost defines the firm's profit.
III. The firm pays for acquired inputs (Cost of Production).
IV. The firm earns revenue.

A III, I, IV, II

B I, III, IV, II

C III, IV, I, II

D IV, I, III, II

💡 Short Explanation

�� The firm first acquires inputs and incurs cost. �� The produced output is sold to earn revenue. �� Profit is calculated as Revenue − Cost.

✅ Correct Answer Explanation

The firm's production process begins with acquiring inputs, which creates the cost of production (III). After production, the output is sold in the market (I). Once the sale takes place, the firm earns revenue (IV). Finally, profit is determined by calculating the difference between revenue and cost (II). Thus, the correct sequence is: III → I → IV → II Therefore, Option A is correct. Option B is incorrect because output cannot be sold before the firm incurs production costs. Option C is incorrect because revenue is earned only after the output is sold. Option D is incorrect because revenue cannot be earned before selling the output.

❓ Why Other Options Are Incorrect

�� Option B → The firm must first incur production cost before selling the output.
�� Option C → Revenue is earned after the sale of output, not before it.
�� Option D → Revenue cannot precede production cost and sale.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Arrange the events according to the logical production and profit determination process.

Final Logic:

Cost → Sale → Revenue → Profit.

🧠 Memory Trick

Cost → Sell → Revenue → Profit

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Production Process and Profit

5 Match the firm's analytical parameters to their definitions:

List I	List II
1. Technology	a. Denotes that no more output can be drawn from the same level of inputs.
2. Efficiency	b. The knowledge that dictates maximum output limits for input combinations.
3. Production Function	c. The mathematical relationship dictating exact maximum output for given inputs.

A 1-b, 2-a, 3-c

B 1-c, 2-b, 3-a

C 1-a, 2-b, 3-c

D 1-b, 2-c, 3-a

💡 Short Explanation

�� Technology determines production possibilities. �� Efficiency means obtaining maximum output from given inputs. �� A production function mathematically relates inputs to maximum output.

✅ Correct Answer Explanation

Technology refers to the available knowledge that determines the maximum output obtainable from different input combinations. Efficiency means that no additional output can be produced from the same quantity of inputs, indicating technically efficient production. A Production Function is the mathematical relationship showing the maximum output obtainable from specified quantities of inputs under a given technology. Therefore, the correct matching is: 1 → b 2 → a 3 → c Hence, Option A is correct. Options B, C, and D incorrectly interchange the definitions of technology, efficiency, and the production function.

❓ Why Other Options Are Incorrect

�� Option B → Technology is not the mathematical production function, and efficiency is not technological knowledge.
�� Option C → Efficiency and technology are incorrectly interchanged.
�� Option D → Efficiency is incorrectly matched with the production function.

🎯 Strategy

Used

Option Grouping

Application:

Match each economic concept with its precise NCERT definition before selecting the correct combination.

Final Logic:

Technology → Knowledge, Efficiency → Maximum Output, Production Function → Mathematical Relationship.

🧠 Memory Trick

P = Production Function → Production Formula

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Technology, Efficiency and Production Function

6 Assertion (A): If either Capital (K) or Labour (L) increases in the function q = K × L, the output q will also increase.
Reason (R): A production function dictates that for any specific combination of L and K, there can be multiple efficient q values depending on the firm's choice.

A Both A and R are true and R is the correct explanation of A.

B Both A and R are true but R is not the explanation of A.

C A is true but R is false.

D A is false but R is true.

💡 Short Explanation

�� In the function q = K × L, increasing either input increases output if the other input remains positive. �� A production function gives one maximum output for each input combination. �� The Reason contradicts the definition of a production function.

✅ Correct Answer Explanation

The production function q = K × L shows that output is the product of capital and labour. If either K or L increases while the other remains positive, output also increases. Therefore, the Assertion is true. The Reason is false because a production function specifies one unique maximum output for every given combination of labour and capital under a given technology. Firms do not choose among multiple efficient output levels for the same input combination. Thus, Option C is correct.

❓ Why Other Options Are Incorrect

�� Option A → The Reason is false because one input combination corresponds to only one maximum output.
�� Option B → Both statements are not true.
�� Option D → The Assertion is correct since increasing either input increases output in q = K × L.

🎯 Strategy

Used

Elimination

Application:

Evaluate the Assertion and Reason separately before determining whether the Reason explains the Assertion.

Final Logic:

Assertion is true; Reason is false.

🧠 Memory Trick

One Input Combination = One Maximum Output

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Production Function

7 Regarding the simple two-input model q = f(L,K), which statements logically hold true?
1. It exclusively maps to efficient usage of L and K.
2. It allows for q to decrease when inputs increase, assuming technology improves.
3. The relationship is strictly bounded by the given technological knowledge.

A 1 and 2 only

B 1 and 3 only

C 2 and 3 only

D 1, 2, and 3

💡 Short Explanation

�� The production function assumes efficient input use. �� It is defined for a given technology. �� Improved technology does not reduce output for increased inputs.

✅ Correct Answer Explanation

The production function q = f(L, K) shows the maximum output obtainable from labour and capital under a given technology. Statement 1 is correct because the production function represents technically efficient production. Statement 2 is incorrect because improving technology increases or maintains production possibilities; it does not cause output to decrease when inputs increase. Statement 3 is correct because every production function is defined for a specific level of technological knowledge. Therefore, Option B is correct.

❓ Why Other Options Are Incorrect

�� Option A → Statement 2 is incorrect.
�� Option C → Statement 2 is false.
�� Option D → All three statements are not correct because Statement 2 is incorrect.

🎯 Strategy

Used

Option Grouping

Application:

Evaluate each statement independently before selecting the correct combination.

Final Logic:

Efficient Production + Given Technology = Production Function.

🧠 Memory Trick

Production Function = Efficiency + Technology

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Production Function

8 In evaluating the algebraic Cobb-Douglas specification f(tx₁, tx₂) > t × f(x₁, x₂), this inequality mathematically defines which specific concept of scale?

A Constant Returns to Scale

B Increasing Returns to Scale

C Decreasing Returns to Scale

D Diminishing Marginal Product

💡 Short Explanation

�� Output increases more than proportionately. �� Scaling all inputs by t increases output by more than t. �� This is the definition of Increasing Returns to Scale.

✅ Correct Answer Explanation

For a Cobb-Douglas production function: f(tx₁, tx₂) = t·f(x₁, x₂) indicates Constant Returns to Scale. f(tx₁, tx₂) > t·f(x₁, x₂) indicates Increasing Returns to Scale (IRS) because output increases by a greater proportion than inputs. f(tx₁, tx₂) < t·f(x₁, x₂) indicates Decreasing Returns to Scale. Therefore, the given inequality represents Increasing Returns to Scale, making Option B correct.

❓ Why Other Options Are Incorrect

�� Option A → Constant Returns require equality, not a greater-than sign.
�� Option C → Decreasing Returns require the output to increase less than proportionately.
�� Option D → Diminishing Marginal Product is a short-run concept involving one variable input, not returns to scale.

🎯 Strategy

Used

Substitution

Application:

Compare the given inequality with the standard mathematical definitions of returns to scale.

Final Logic:

Greater-than (>) means output rises more than proportionately.

🧠 Memory Trick

">" = More Output = Increasing Returns

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Returns to Scale

9 Because the production function deals only with the efficient use of inputs, it inherently describes the _________ boundary of the firm's production capabilities.

A Minimum cost

B Maximum output

C Average revenue

D Marginal expenditure

💡 Short Explanation

�� Production functions assume technical efficiency. �� They show the highest attainable output. �� They define the firm's production frontier.

✅ Correct Answer Explanation

A production function shows the maximum output obtainable from a given combination of inputs under existing technology. Since it assumes efficient use of resources, it represents the upper limit or production boundary of the firm's productive capacity. Option B is correct. Option A refers to cost analysis rather than production. Option C concerns revenue, not production capability. Option D relates to expenditure, not output.

❓ Why Other Options Are Incorrect

�� Option A → Minimum cost belongs to cost theory, not the production function.
�� Option C → Average revenue is unrelated to the production boundary.
�� Option D → Marginal expenditure is not a production concept.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Identify which concept best matches "efficient use of inputs."

Final Logic:

Efficient inputs imply maximum attainable output.

🧠 Memory Trick

Production Function = Maximum Output Frontier

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Technical Efficiency

10 Match the Returns to Scale outcomes derived from output maximization behavior when scaling up inputs t times:

List I	List II
1. Output increases by exactly t times.	a. Decreasing Returns to Scale
2. Output increases by less than t times.	b. Constant Returns to Scale
3. Output increases by more than t times.	c. Increasing Returns to Scale

A 1-b, 2-a, 3-c

B 1-a, 2-b, 3-c

C 1-c, 2-a, 3-b

D 1-b, 2-c, 3-a

💡 Short Explanation

�� Equal increase in output → Constant Returns. �� Smaller increase in output → Decreasing Returns. �� Larger increase in output → Increasing Returns.

✅ Correct Answer Explanation

Returns to Scale describe how output changes when all inputs are increased proportionately. If output increases exactly t times, it is Constant Returns to Scale (CRS). If output increases less than t times, it is Decreasing Returns to Scale (DRS). If output increases more than t times, it is Increasing Returns to Scale (IRS). Thus, the correct matching is: 1 → b 2 → a 3 → c Therefore, Option A is correct.

❓ Why Other Options Are Incorrect

�� Option B → Constant and Decreasing Returns are incorrectly interchanged.
�� Option C → Constant and Increasing Returns are incorrectly matched.
�� Option D → Increasing and Decreasing Returns are interchanged.

🎯 Strategy

Used

Option Grouping

Application:

Recall the standard NCERT classification of Returns to Scale and match each output behavior.

Final Logic:

Equal = CRS, Less = DRS, More = IRS.

🧠 Memory Trick

Equal–Less–More → CRS–DRS–IRS

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Returns to Scale

11 Arrange the phases of changing factor proportions as a variable input is added to a fixed input:
I. The production process becomes too crowded with the variable input.
II. Factor proportions become increasingly suitable for production, and marginal product increases.
III. The ratio in which the two inputs are combined (factor proportions) begins to change.

A III, I, II

B I, II, III

C III, II, I

D II, I, III

💡 Short Explanation

�� Initially, factor proportions begin to change. �� Better factor proportions increase marginal product. �� Excessive use of the variable input eventually causes crowding.

✅ Correct Answer Explanation

When one factor (such as land) is fixed and the other factor (such as labour) is increased, the factor proportions begin to change (III). Initially, this improves the utilization of the fixed factor, making the factor proportions more suitable for production, causing the marginal product to increase (II). As more units of the variable input are added, the fixed factor becomes crowded, reducing the efficiency of additional units of labour (I). Therefore, the correct sequence is: III → II → I Hence, Option C is correct.

❓ Why Other Options Are Incorrect

�� Option A → Crowding occurs only after the stage of improving factor proportions.
�� Option B → Crowding cannot occur before factor proportions improve.
�� Option D → The process starts with changing factor proportions, not with increasing marginal product.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Arrange the stages according to the logical progression of the law of variable proportions.

Final Logic:

Changing Proportions → Better Utilization → Crowding.

🧠 Memory Trick

Change → Improve → Crowd

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Law of Variable Proportions

12 Assertion (A): With both inputs strictly necessary, if Capital is 0 and Labour is 100, the maximum possible output is 0.
Reason (R): The production function requires both inputs to be positive for the output to be positive.

A Both A and R are true and R is the correct explanation of A.

B Both A and R are true but R is not the explanation of A.

C A is true but R is false.

D A is false but R is true.

💡 Short Explanation

�� Both labour and capital are necessary inputs. �� Zero quantity of one input results in zero output. �� The Reason correctly explains the Assertion.

✅ Correct Answer Explanation

The simplified two-factor production model assumes that both labour and capital are necessary inputs. If either input becomes zero, production cannot occur, regardless of how much of the other input is available. Therefore, when Capital = 0 and Labour = 100, the maximum possible output is still 0. The Reason correctly explains why the Assertion is true. Hence, Option A is correct.

❓ Why Other Options Are Incorrect

�� Option B → The Reason directly explains the Assertion.
�� Option C → The Reason is true.
�� Option D → Both the Assertion and the Reason are true.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Recall the NCERT assumption that both labour and capital are essential inputs.

Final Logic:

No Capital or No Labour = No Output.

🧠 Memory Trick

Zero in One → Zero Output

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Necessary Inputs

13 Which of the following analytical observations are correct concerning an isoquant map (where q3 > q2 > q1)?
1. Fixing capital at K1 and increasing labour allows the firm to reach a higher isoquant.
2. An isoquant is the exact equivalent of an indifference curve but applies to consumer behavior.
3. Negatively sloped isoquants rely on the assumption that marginal products are positive.

A 1 and 2 only

B 1 and 3 only

C 2 and 3 only

D 1, 2, and 3

💡 Short Explanation

�� Increasing labour with fixed capital can increase output. �� Isoquants represent producer behaviour. �� Positive marginal products lead to negatively sloped isoquants.

✅ Correct Answer Explanation

Statement 1 is correct because increasing labour while keeping capital fixed can move production to a higher isoquant if output increases. Statement 2 is incorrect because an indifference curve belongs to consumer theory, whereas an isoquant belongs to producer theory. Statement 3 is correct because the negative slope of an isoquant depends on the assumption that both inputs have positive marginal products. Therefore, Statements 1 and 3 are correct, making Option B the correct answer.

❓ Why Other Options Are Incorrect

�� Option A → Statement 2 is incorrect because isoquants do not describe consumer behaviour.
�� Option C → Statement 2 is false.
�� Option D → All three statements are not correct because Statement 2 is incorrect.

🎯 Strategy

Used

Option Grouping

Application:

Evaluate each statement separately before selecting the correct combination.

Final Logic:

Producer Theory + Positive Marginal Products = Correct.

🧠 Memory Trick

Indifference Curve = Consumer

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Isoquant Map

14 An isoquant representing a constant output set will be negatively sloped only under the mathematical condition that the _________ of the inputs are positive.

A Fixed costs

B Average products

C Marginal products

D Constant returns

💡 Short Explanation

�� Both inputs must have positive marginal products. �� One input substitutes for the other. �� Output remains constant along an isoquant.

✅ Correct Answer Explanation

An isoquant is negatively sloped because, when both inputs have positive marginal products, increasing one input allows the producer to reduce the other while maintaining the same level of output. If either input did not have a positive marginal product, this substitution would not be possible. Therefore, Option C is correct. Fixed costs, average products and constant returns do not determine the slope of an isoquant.

❓ Why Other Options Are Incorrect

�� Option A → Fixed costs are cost concepts and do not determine the slope of an isoquant.
�� Option B → Average product does not explain why isoquants slope downward.
�� Option D → Constant returns to scale describe proportional changes in output, not the slope of an isoquant.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Recall the NCERT condition required for input substitution along an isoquant.

Final Logic:

Positive Marginal Products → Negative Isoquant.

🧠 Memory Trick

Positive MP → Downward Isoquant

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Properties of Isoquants

15 Match the operational constraints with their defining economic time frame.

List I	List II
1. A time frame permitting simultaneous proportional scaling of all inputs.	a. Short run
2. A time frame restricting scaling by keeping at least one input constant.	b. Long run
3. A production period in which all factors of production are variable.	c. Long run
4. A production period in which at least one factor of production remains fixed.	d. Short run

A 1-b, 2-a, 3-c, 4-d

B 1-a, 2-b, 3-d, 4-c

C 1-b, 2-b, 3-a, 4-d

D 1-a, 2-a, 3-c, 4-b

💡 Short Explanation

�� In the long run, all factors of production are variable. �� In the short run, at least one factor remains fixed. �� Production periods are distinguished by the variability of inputs.

✅ Correct Answer Explanation

According to NCERT, the classification of production periods depends on whether factors of production can be varied. 1 → b A time frame permitting simultaneous proportional scaling of all inputs is the long run because firms can change all factors of production. Therefore, 1 → b. 2 → a A time frame in which at least one input remains fixed is the short run because firms cannot vary all factors simultaneously. Therefore, 2 → a. 3 → c A production period in which all factors of production are variable is the long run. Therefore, 3 → c. 4 → d A production period in which at least one factor of production remains fixed is the short run. Therefore, 4 → d. Thus, the correct matching is: 1 → b 2 → a 3 → c 4 → d Hence, Option A is correct.

❓ Why Other Options Are Incorrect

�� Option B → Incorrect because it reverses the definitions of the short run and long run for all four matches.
�� Option C → Incorrect because Statements 2 and 3 are matched with incorrect production periods.
�� Option D → Incorrect because Statements 1, 2, and 4 are incorrectly matched with the respective time periods.

🎯 Strategy

Used: Option Grouping

Application:

Identify whether each statement describes the short run or the long run, then match the complete set with the correct option.

Final Logic:

All inputs variable → Long run.
At least one input fixed → Short run.

🧠 Memory Trick

Short → One Fixed

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Short Run and Long Run

16 Assertion (A): It is impossible to universally define the short run as exactly "one month" across all different industries.
Reason (R): A period is defined as long run or short run purely based on whether all inputs can be varied, which differs across production processes.

A Both A and R are true and R is the correct explanation of A.

B Both A and R are true but R is not the explanation of A.

C A is true but R is false.

D A is false but R is true.

💡 Short Explanation

�� Short run is not measured by calendar time. �� It depends on input variability. �� The Reason correctly explains the Assertion.

✅ Correct Answer Explanation

The Assertion is true because economists do not define the short run as a fixed period such as one month or one year. The duration of the short run varies from one industry to another. The Reason is also true because the distinction between the short run and the long run depends on whether all factors of production can be varied. Different industries require different lengths of time to adjust all inputs. Thus, the Reason correctly explains the Assertion. Therefore, Option A is correct.

❓ Why Other Options Are Incorrect

�� Option B → The Reason directly explains why no universal calendar period can define the short run.
�� Option C → The Reason is true.
�� Option D → Both the Assertion and the Reason are true.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Determine whether the Reason provides the economic basis for the Assertion.

Final Logic:

Input variability—not calendar time—defines the short run.

🧠 Memory Trick

Not Calendar, Think Inputs

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Short Run and Long Run

17 Arrange the relationship logic between fixed factors and firm costs in the short run:
I. To increase output, the firm employs more variable inputs, increasing total variable cost.
II. The firm identifies a factor that cannot be varied (Fixed Factor).
III. The cost incurred to employ this fixed factor remains constant regardless of output levels (Total Fixed Cost).

A II, III, I

B I, II, III

C III, I, II

D II, I, III

💡 Short Explanation

�� First identify the fixed factor. �� Fixed factors create Total Fixed Cost. �� Output is increased by employing more variable inputs.

✅ Correct Answer Explanation

In the short run, the firm first identifies the factor that cannot be varied, known as the fixed factor (II). Since this factor remains unchanged, the expenditure on it becomes Total Fixed Cost, which does not vary with output (III). To increase production, the firm employs more units of the variable factor, leading to an increase in Total Variable Cost (I). Thus, the correct sequence is: II → III → I Therefore, Option A is correct.

❓ Why Other Options Are Incorrect

�� Option B → The fixed factor must be identified before increasing variable inputs.
�� Option C → Total Fixed Cost cannot be identified before identifying the fixed factor.
�� Option D → Total Fixed Cost should be recognized before discussing increases in Total Variable Cost.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Arrange the concepts according to the logical sequence of short-run production and cost analysis.

Final Logic:

Identify Fixed Factor → Total Fixed Cost → Increase Variable Input.

🧠 Memory Trick

Fixed → Fixed Cost → Variable Cost

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Fixed and Variable Factors

18 When one factor is fixed and the other varies, the initial phase where the variable factor adds proportionally more and more to total output is caused by factor proportions becoming increasingly _________ for production.

A Crowded

B Suitable

C Expensive

D Rigid

💡 Short Explanation

�� Initially, fixed and variable factors are not optimally combined. �� Increasing the variable input improves factor proportions. �� Marginal Product rises during this stage.

✅ Correct Answer Explanation

In the initial stage of the Law of Variable Proportions, the fixed factor is underutilized. As additional units of the variable factor are employed, the combination of labour and capital becomes more suitable for production. Consequently, each additional unit of the variable factor contributes proportionally more to output, causing Marginal Product to increase. Therefore, Option B (Suitable) is correct. Option A is incorrect because crowding occurs in the later stage when too many units of the variable factor are employed. Option C is unrelated to production efficiency. Option D does not explain the improvement in productivity.

❓ Why Other Options Are Incorrect

�� Option A → Crowding occurs after the optimum combination is exceeded, leading to diminishing marginal product.
�� Option C → Production cost does not explain the rise in marginal product.
�� Option D → Rigid factor proportions do not increase productivity.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Identify the stage of the Law of Variable Proportions described in the question.

Final Logic:

Better Factor Proportions → Higher Marginal Product.

🧠 Memory Trick

Suitable Mix → Rising MP

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Law of Variable Proportions

📄 Passage

"If he uses only 1 worker, he has too much land for the worker to cultivate alone. As he increases the number of workers, the amount of labour per unit land increases, and each worker adds proportionally more and more to the total output. Marginal product increases in this phase. When the fourth worker is hired, the land begins to get 'crowded'. Each worker now has insufficient land to work efficiently. So the output added by each additional worker is now proportionally less. The marginal product begins to fall."

According to the passage, what specific phenomenon mathematically triggers the onset of the law of diminishing marginal product?

A The absolute depletion of the variable input.

B The fixed factor (land) becoming too 'crowded' relative to the variable input (labour).

C The increase of both inputs simultaneously by the same proportion.

D The technological degradation of the production function.

💡 Short Explanation

�� Land is the fixed factor. �� Labour is the variable factor. �� Crowding of the fixed factor causes diminishing marginal product.

✅ Correct Answer Explanation

The passage clearly explains that after employing additional workers, the fixed factor (land) becomes crowded. Since each worker now has less land available to work on, the additional output contributed by each new worker begins to decline. This marks the beginning of the Law of Diminishing Marginal Product. Therefore, Option B is correct. Option A is incorrect because labour is increasing, not depleting. Option C refers to returns to scale, not diminishing marginal product. Option D is incorrect because technology is assumed to remain constant.

❓ Why Other Options Are Incorrect

�� Option A → The variable input is increasing, not being depleted.
�� Option C → Increasing all inputs proportionately relates to Returns to Scale, not the Law of Variable Proportions.
�� Option D → The production technology is assumed to remain unchanged.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Identify the exact reason for diminishing marginal product stated in the passage.

Final Logic:

Crowded Fixed Factor → Falling Marginal Product.

🧠 Memory Trick

Crowded Land = Diminishing MP

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Law of Variable Proportions

📄 Passage

Based on the passage's explanation of numerical input-output behavior, what happens to the marginal product curve after the "crowding" threshold (e.g., hiring the fourth worker) is reached?

A It becomes a rectangular hyperbola.

B It begins to rise at an increasing rate.

C It begins to fall, creating an inverse 'U' shape.

D It remains perfectly constant.

💡 Short Explanation

�� Initially, Marginal Product rises. �� After crowding, Marginal Product falls. �� The MP curve becomes an inverse 'U'.

✅ Correct Answer Explanation

As more units of labour are added to a fixed amount of land, Marginal Product (MP) first rises because factor proportions improve. After the fixed factor becomes crowded, each additional worker contributes less to total output, causing Marginal Product to decline. Consequently, the MP curve assumes the familiar inverse 'U' shape described in NCERT. Therefore, Option C is correct. Option A is unrelated to production theory. Option B describes the initial stage only. Option D is incorrect because MP does not remain constant.

❓ Why Other Options Are Incorrect

�� Option A → A rectangular hyperbola is not the shape of the Marginal Product curve.
�� Option B → MP rises only initially; after crowding it begins to decline.
�� Option D → Marginal Product changes with each additional unit of labour.

🎯 Strategy

Used

Contextual/Tonal Matching

Application:

Use the passage to identify the stage after crowding occurs.

Final Logic:

Crowding → Falling MP → Inverse 'U' Curve.

🧠 Memory Trick

Improve → Peak → Decline

📚 Class XI – Introductory Microeconomics – Chapter: Production and Costs – Topic: Law of Variable Proportions and Marginal Product Curve

CUET UG Economics Booster Test 3 - Production Fundamentals

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