Class 12 Micro Economics - Chapter The Theory of the Firm under Perfect Competition NCERT Solutions | What is the ‘price line’?

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.

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?

How does the imposition of a unit tax affect the supply curve of a firm?

What is the supply curve of a firm in the long run?

What is the relation between market price and average revenue of a price-taking firm?

What is the relation between market price and marginal revenue of a price-taking firm?

How does an increase in the number of firms in a market affect the market supply curve?

Compute the total revenue, marginal revenue and average revenue schedules in the following table. Market price of each unit of the good is Rs 10.

How does an increase in the price of an input affect the supply curve of a firm?

Will a profit-maximising firm in a competitive market ever produce a positive level of output in the range where the marginal cost is falling? Give an explanation.

Explain the concept of a production function

What would be the shape of the demand curve so that the total revenue curve is?

(a) A positively sloped straight line passing through the origin?

(b) A horizontal line?

Explain market equilibrium.

Discuss the central problems of an economy.

What do you mean by the budget set of a consumer?

What is the total product of input?

From the schedule provided below calculate the total revenue, demand curve and the price elasticity of demand:

When do we say that there is an excess demand for a commodity in the market?

What do you mean by the production possibilities of an economy?

What is budget line?

Comment on the shape of MR curve in case when TR curve is a

(a) Positively sloped straight line

(b) Horizontal straight line

What happens to the budget set if both the prices as well as the income double?

When do we say that there is an excess demand for a commodity in the market?

What is the law of variable proportions? 

Suppose your friend is indifferent to the bundles (5, 6) and (6, 6). Are the preferences of your friend monotonic?

What do you mean by substitutes? Give examples of two goods which are substitutes of each other.

What is meant by prices being rigid? How can oligopoly behavior lead to such an outcome? 

How is the optimal amount of labor determined in a perfectly competitive market?

What do you mean by the production possibilities of an economy?

How will a change in the price of coffee affect the equilibrium price of tea? Explain the effect on equilibrium quantity also through a diagram.