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Principles of Demand and Elasticity Quiz

#1

Which of the following best defines the law of demand?

As the price of a good decreases, the quantity demanded increases.
Explanation

Inverse relationship between price and quantity demanded.

#2

What is the formula for price elasticity of demand?

Percentage change in price / Percentage change in quantity demanded
Explanation

Measure of responsiveness of quantity demanded to price changes.

#3

Which of the following factors does NOT affect the price elasticity of demand?

Number of sellers
Explanation

Factors influencing demand elasticity.

#4

What does it mean if the price elasticity of demand is perfectly inelastic?

Quantity demanded is unaffected by changes in price.
Explanation

Extreme inflexibility in quantity demanded.

#5

Which of the following is a characteristic of perfectly elastic demand?

The demand curve is horizontal.
Explanation

Extremely responsive demand with an infinite elasticity value.

#6

If the price of a product increases by 10% and the quantity demanded decreases by 15%, what is the price elasticity of demand?

1.67
Explanation

Calculation of elasticity based on percentage changes in price and quantity.

#7

What does it mean if the price elasticity of demand is unitary elastic?

The percentage change in quantity demanded equals the percentage change in price.
Explanation

Equal proportionate changes in quantity demanded and price.

#8

What does a price elasticity of demand greater than 1 indicate?

Demand is elastic.
Explanation

Sensitivity of demand to price changes.

#9

If the income elasticity of demand for a good is negative, what does it indicate about the good?

It is an inferior good.
Explanation

Goods for which demand decreases as income increases.

#10

If the cross-price elasticity of demand between two goods is positive, what kind of relationship do they have?

They are complementary goods.
Explanation

Goods that are typically consumed together.

#11

What does it indicate if the price elasticity of supply is less than 1?

Supply is inelastic.
Explanation

Insensitivity of supply to price changes.

#12

What does it mean if the income elasticity of demand for a good is greater than 1?

It is a luxury good.
Explanation

Goods for which demand increases more than proportionally with income.

#13

If the price elasticity of supply is greater than 1, what does it indicate about the supply of the good?

Supply is elastic.
Explanation

High responsiveness of supply to price changes.

#14

What does it mean if the cross-price elasticity of demand is negative?

The goods are complementary.
Explanation

Inverse relationship in demand between two goods.

#15

What does a cross-price elasticity of demand of 0 indicate between two goods?

There is no relationship between the goods.
Explanation

Absence of connection in demand between two goods.

#16

If the demand for a good is price elastic, what happens to total revenue when the price increases?

Total revenue decreases.
Explanation

Impact of price changes on total revenue with elastic demand.

#17

What is the formula for income elasticity of demand?

Percentage change in income / Percentage change in quantity demanded
Explanation

Measure of responsiveness of quantity demanded to changes in income.

#18

What does it mean if the price elasticity of demand is greater than 1 in absolute value?

Demand is elastic.
Explanation

High sensitivity of demand to price changes.

#19

What does it mean if the price elasticity of demand is zero?

Demand is perfectly inelastic.
Explanation

No change in quantity demanded with any change in price.

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