Q: Which of the following formulas is used to calculate the price elasticity of demand?

$$E_d = \frac{\%\ \text{change in quantity demanded}}{\%\ \text{change in price}}$$

Question 1

Which of the following best describes the concept of opportunity cost in microeconomics?

Accepted Answer

The value of the next best alternative foregone when a choice is made.

Question 2

Suppose the market for coffee is in equilibrium. If a drought destroys a large portion of the coffee crop, what is the most likely immediate effect on the equilibrium price and quantity of coffee?

Accepted Answer

Equilibrium price increases and equilibrium quantity decreases.

Question 3

A student is deciding between spending an hour studying for a microeconomics exam or working at a part-time job that pays $15 per hour. If the student chooses to study, what is the opportunity cost?

Accepted Answer

The $15 the student could have earned by working.

Question 4

Which of the following equations correctly represents the condition for market equilibrium in a simple supply and demand model?

Accepted Answer

$$Q_d = Q_s$$

Question 5

If the price elasticity of demand for a product is $$|E_d| = 2.5$$, what does this imply about consumer responsiveness to price changes?

Accepted Answer

Demand is elastic; consumers are highly responsive to price changes.

Question 6

A city government imposes a price ceiling on apartment rents below the equilibrium price. What is the most likely result in the rental market?

Accepted Answer

A shortage of apartments.

Question 7

Which of the following best illustrates the concept of a public good?

Accepted Answer

A city park that is open to all residents.

Question 8

Suppose the government introduces a subsidy for electric vehicles. Using supply and demand analysis, what is the expected effect on the market for electric vehicles?

Accepted Answer

The demand curve shifts right, leading to a higher equilibrium quantity.

Question 9

Which of the following formulas is used to calculate the price elasticity of demand?

Accepted Answer

$$E_d = \frac{\%\ 	ext{change in quantity demanded}}{\%\ 	ext{change in price}}$$

Question 10

A perfectly competitive firm faces a market price of $$P = 10$$ and has a marginal cost curve given by $$MC = 2 + Q. $$What quantity should the firm produce to maximize profit?

Accepted Answer

$$Q = 8$$

Question 11

Which of the following is a characteristic of a monopoly market structure?

Accepted Answer

One firm is the sole producer with significant barriers to entry.

Question 12

If a firm in monopolistic competition is earning economic profits in the short run, what is likely to happen in the long run?

Accepted Answer

New firms will enter, driving economic profits to zero.

Question 13

Which of the following best describes the concept of comparative advantage?

Accepted Answer

The ability to produce a good at a lower opportunity cost than another producer.

Question 14

Suppose the demand for a product is given by $$Q_d = 100 - 2P$$ and the supply is $$Q_s = 4P. $$What is the equilibrium price?

Accepted Answer

$$P = 20$$

Question 15

Which of the following is an example of a positive externality?

Accepted Answer

A homeowner planting a garden that beautifies the neighborhood.

Question 16

If the cross-price elasticity of demand between two goods is positive, what does this indicate about the relationship between the goods?

Accepted Answer

They are substitutes.

Question 17

A country can produce either 100 units of wheat or 200 units of corn with its available resources. What is the opportunity cost of producing one unit of wheat?

Accepted Answer

2 units of corn

Question 18

Which of the following best describes the role of government in correcting market failure due to externalities?

Accepted Answer

Imposing taxes or subsidies to align private and social costs or benefits.

Question 19

If a firm’s total cost function is $$TC = 100 + 5Q$$, what is the average total cost (ATC) when $$Q = 10$$?

Accepted Answer

$$ATC = 15$$

Question 20

Which of the following statements about the grading system in this microeconomics course is correct?

Accepted Answer

The final letter grade is determined by the weighted average of the four Unit Exams (or Challenge Exams) and the Final Exam.

Principles of Microeconomics: Course Structure, Study Methods, and Assessment Guide

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