Why is the short-run marginal cost curve 'U'-shaped?
The long run marginal cost (LMC) and long run average cost (LAC) are U shaped curves. The reason behind them being U-shaped is due to the law of returns to scale. It is argued that a firm generallyn experiences IRS during the initial period of production followed by CRS, and lastly by DRS. Consequently, both LAC and LMC are U-shaped curves. Due to IRS, as the output increases, LAC falls due to economies of scale. Then falling LAC experiences CRS at Q1 level of output which is also called the optimum capacity. Beyond Q1 level of output, the firm
experiences diseconomies of scale and if the firm continues to produce
beyond Q1 level, the cost of production will rise.
Popular Questions of Class 12 Micro Economics
- Q:-
What is the supply curve of a firm in the long run?
- Q:-
The market price of a good changes from Rs 5 to Rs 20. As a result, the quantity supplied by a firm increases by 15 units. The price elasticity of the firm’s supply curve is 0.5. Find the initial and final output levels of the firm.
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A firm earns a revenue of Rs 50 when the market price of a good is Rs 10. The market price increases to Rs 15 and the firm now earns a revenue of Rs 150. What is the price elasticity of the firm’s supply curve?
- Q:-
Distinguish between a centrally planned economy and a market economy.
- Q:-
How does the imposition of a unit tax affect the supply curve of a firm?
- Q:-
A consumer wants to consume two goods. The prices of the two goods are Rs 4
and Rs 5 respectively. The consumer’s income is Rs 20.
(i) Write down the equation of the budget line.
(ii) How much of good 1 can the consumer consume if she spends her entire
income on that good?
(iii) How much of good 2 can she consume if she spends her entire income on
that good?
(iv) What is the slope of the budget line?
Questions 5, 6 and 7 are related to question 4. - Q:-
What is the relation between market price and average revenue of a price-taking firm?
- Q:-
What is budget line?
- Q:-
Suppose there are 20 consumers for a good and they have identical demand functions:
d(p)=10–3pd(p)=10–3p for any price less than or equal to 103103 and d1(p)=0d1(p)=0 at any price greater than 103.
- Q:-
Suppose your friend is indifferent to the bundles (5, 6) and (6, 6). Are the preferences of your friend monotonic?
Recently Viewed Questions of Class 12 Micro Economics
- Q:-
What are the total fixed cost, total variable cost and total cost of a firm? How are they related?
- Q:-
What do the long-run marginal cost and the average cost curves look like?
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What is the average product of an input?
- Q:-
How is the optimal amount of labor determined in a perfectly competitive market?
- Q:-
Let the production function of a firm be Q=2 L2 K2Q=2 L2 K2
Find out the maximum possible output that the firm can produce with 5 units of LL and 2 units of KK. What is the maximum possible output that the firm can produce with zero units of LL and 10 units of KK?
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Consider the demand for a good. At price Rs 4, the demand for the good is 25 units. Suppose the price of the good increases to Rs 5, and as a result, the demand for the good falls to 20 units. Calculate the price elasticity.
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What is the marginal product of an input?
- Q:-
What do you mean by a normal good?
- Q:-
Considering the same demand curve as in exercise 22, now let us understand for free entry and exit of the firms producing commodity X. Also assume the market consists of identical firms producing commodity X. Let the supply curve of a single firm be explained?
q*= 8+3p for p ≥ 20
= 0 for 0 ≤ p ≤ Rs 20
(a) What is the significance of p =20?
(b) At what price will the market for X be in equilibrium? State the reason for your answer.
(c) Calculate the equilibrium quantity and number of firms.
- Q:-
Suppose your friend is indifferent to the bundles (5, 6) and (6, 6). Are the preferences of your friend monotonic?
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