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Elasticity of supply - class-X

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The supply is __________, when a greater change in price leads to smaller change in quantity supplied.

  1. relatively more elastic

  2. perfectly elastic

  3. perfectly inelastic

  4. relatively inelastic


Correct Option: D

The percentage change in quantity supplied due to percentage change in price is called __________.

  1. elasticity of supply

  2. law of supply

  3. supply curve

  4. elasticity of demand


Correct Option: A
Supply is more elastic in case of ______________.
  1. very short period

  2. short period

  3. long period

  4. both (b) and (c)


Correct Option: C
When 15% increase in price of the commodity causes 10% increase in the quantity supplied, then elasticity of supply is _____________.
  1. elastic

  2. inelastic

  3. perfectly elastic

  4. perfectly inelastic


Correct Option: B

Write True or False with a reason.
Price elasticity of supply measures the change in quantity supplied in response to a change in own price of the commodity.

  1. True

  2. False


Correct Option: A
Explanation:

True. Price elasticity of supply$=\cfrac { Percentage\quad change\quad in\quad quantity\quad supplied }{ Percentage\quad change\quad in\quad price } $

CRR refers to the share of_____________ that rural banks have to maintain with RBI of their net demand and time liabilities?

  1. Liquid cash

  2. Gold

  3. Forex reserves

  4. Illiquid cash


Correct Option: A

When the Cross Price Elasticity of demand between two goods is zero then those goods are called?

  1. Independent goods

  2. Luxury goods

  3. Substitute goods

  4. Complementary goods


Correct Option: A

Rent will be produced at that time when ________.

  1. entire land is fertile

  2. elasticity of supply of land is perfectly elastic

  3. land is mobile

  4. none of the above


Correct Option: B
Explanation:

Rent on land will be produced only when different types of lands are differently fertile. At the same time, the supply of land should be elastic and not perfectly elastic.

Land is the only factor of production whose supply is _____.

  1. more elastic

  2. perfectly elastic

  3. perfectly inelastic

  4. unitary elastic


Correct Option: C
Explanation:

A perfectly inelastic supply curve is a vertical line at a given quantity, which shows a constant supply regardless of price. Land becomes one such factor of production.

The horizontal demand curve parallel to X-axis implies that the elasticity of demand is ______.

  1. zero

  2. infinite

  3. equal to one

  4. greater than zero but less than infinity


Correct Option: B
Explanation:

The horizontal demand curve parallel to X-axis implies that the elasticity of demand is infinite.

How many degrees are there to measure the elasticity of supply?

  1. Two

  2. Three

  3. Four

  4. Five


Correct Option: D

Where will the supply curve be horizontal and parallel to the x-axis?

  1. Perfectly inelastic supply

  2. Unitary elastic supply

  3. Perfectly elastic supply

  4. Less elastic supply


Correct Option: C
Explanation:

When with a minute change or without any change in price, supply may change to any extent, then the supply is Perfectly elastic

__________ are relatively less elastic in supply.

  1. Durable goods

  2. Perishable goods

  3. Both A and B

  4. None of the above


Correct Option: B
Explanation:

This is because if the goods are less perishable, the demand will be lower and hence supplier has lesser power to deviate price. 

Which of the following points underlines the importance of elasticity of supply?

  1. Price determination

  2. Factor pricing

  3. Taxation

  4. All of these


Correct Option: D
Explanation:

Anything that affects the price of a product will affect the price elasticity of supply. Here all factors affect the supply hence option D is correct.

"Elasticity of supply is defined as the percentage change in quantity supplied divided by percentage change in price." Who provided this definition?

  1. Lipsey

  2. Prof. Bilas

  3. McConnel

  4. Thomas


Correct Option: B

Which of the following factors affect the elasticity of supply of a commodity?

  1. Nature of the inputs used

  2. Natural constraints

  3. Nature of the commodity

  4. All of these


Correct Option: D

Supply is _________ when a change in the price causes no change in supply.

  1. perfectly elastic

  2. perfectly inelastic

  3. unitary elastic

  4. less elastic


Correct Option: B

When with a minute change or without any change in price, supply may change to any extent, then the supply is _____________.

  1. perfectly elastic

  2. perfectly inelastic

  3. unitary elastic

  4. more elastic


Correct Option: A
Explanation:

it means that any decrease in the product price would immediately cause the supply to shift to zero.
Algebraically, it means that the 
elasticity of a good or service (the percentage change of quantity / the percentage change of price) equals to infinity.

Which methods are used for the measurement of elasticity of supply?

  1. Percentage or Proportionate Method

  2. Geometric or Diagrammatic Method

  3. Both A and B

  4. None of these


Correct Option: C

The supply of agricultural products is generally ________.

  1. elastic

  2. inelastic

  3. perfectly elastic

  4. perfectly inelastic


Correct Option: B
Explanation:

The supply of agricultural products is generally inelastic that means proportionate change in quantity demand is lesser than the proportionate change in price as agricultural products are necessities since it provides basic subsistence to people.

The vertical supply curve represents ___________ elasticity.

  1. infinite

  2. zero

  3. less

  4. one


Correct Option: A

Elasticity of supply measures ______.

  1. variability of change in supply

  2. reliability of supply

  3. rate at which quantity offered for sale change with change in price

  4. all of the above


Correct Option: C

Elasticity of supply is defined as ________.

  1. % change in supply/% change in price

  2. %change in price/% change in supply

  3. change in supply/change in price

  4. change in supply/% change in price


Correct Option: A

In the short run the supply is ________.

  1. relatively less elastic

  2. more elastic

  3. inelastic

  4. perfectly elastic


Correct Option: A

If a dealer is prepared to supply 1000 sets of a 29" Colour TV if the price is Rs. 12,000 per set, however if at price Rs. 15,000 the dealer is prepared to supply only 1100 TV sets, the elasticity of supply is _________.

  1. 1

  2. 2

  3. 0.4

  4. 1.5


Correct Option: C

A perfectly inelastic supply curve will be _________.

  1. parallel to Y axis or a vertical line

  2. parallel to X axis

  3. U shaped

  4. downward sloping


Correct Option: A

If the time horizon is longer, the elasticity of supply will be _______.

  1. unity

  2. less than unity

  3. more elastic

  4. less than 0


Correct Option: C

Elasticity of supply depends upon ________.

  1. nature of the commodity

  2. production technology

  3. future outlook of prices

  4. all of the above


Correct Option: D

If a dealer is prepared to supply 1000 sets of a 29" Colour TV if the price is Rs. 12,000 per set, however if at Rs. 15,000, the dealer is prepared to supply on 1250 sets of TV the elasticity of supply is ________.

  1. 1

  2. 2

  3. 0.75

  4. 1.4


Correct Option: A

In the long run the supply curve is ________.

  1. inelastic

  2. unity

  3. more elastic

  4. perfectly elastic


Correct Option: C

Which of these does not affect elasticity of supply?

  1. Size of population

  2. Disposal income of consumer

  3. Consumers taste and preference

  4. All of the above


Correct Option: D

A supply curve passing through the origin will have elasticity _______.

  1. less than 1

  2. more than 1

  3. just one

  4. zero


Correct Option: C

Which of these will have highly inelastic supply curve ___________.

  1. perishable goods

  2. consumer durable goods

  3. items of elite class consumption

  4. all of the above


Correct Option: A

A 8% increase in price has caused 6% increase in quantity supplied, the price elasticity of supply will be __________.

  1. 1.33

  2. -1.33

  3. 0.75

  4. -0.66


Correct Option: C

A 6% increase in price has caused 8% decrease quantity supplied, the price elasticity of supply will be _________.

  1. 1.33

  2. -1.33

  3. 0.66

  4. -0.66


Correct Option: B

Very short period is the market condition where the supply remains perfectly ___________.

  1. elastic

  2. inelastic

  3. unity elastic

  4. elasticity less than 1


Correct Option: B

 If Price Rs. 20, Quantity supplied 20, Price 19, Quantity supplied 50 then what will be the arc elasticity of supply?

  1. 5.23

  2. 3.01

  3. 3.85

  4. 4.25


Correct Option: C

Very short period is the market condition where the supply remain perfectly____.

  1. elastic

  2. inelastic

  3. unity elastic

  4. elasticity is less than $1$


Correct Option: B

A dealer of air-conditioners is prepared to supply 1000 pieces of AC if the price is Rs. 20,000 per piece however he is prepared to supply 1200 pieces if the price is Rs. 24,000 per piece. What is the price elasticity of supply of AC?

  1. 0.5

  2. 1

  3. 0.75

  4. 1.25


Correct Option: B

The supply function of a product x is as Sx=4px+6.Where Px stand for price.The quantity supplied corresponding to price of Rs. 2 will be _______.

  1. 18

  2. 14

  3. 15

  4. 10


Correct Option: B

Unitary elasticity of supply means _________.

  1. ${ E } _{ s }>1$

  2. ${ E } _{ s }<1$

  3. ${ E } _{ s }=1$

  4. ${ E } _{ s }=0$


Correct Option: C

A horizontal supply curve parallel to the quantity axis (X-axis) implies that the elasticity of supply is _______.

  1. zero

  2. infinity

  3. equal to one

  4. greater than zero but less than infinity


Correct Option: B

Relatively elastic supply means ________.

  1. ${ E } _{ s }>1$

  2. ${ E } _{ s }<1$

  3. ${ E } _{ s }=\infty$

  4. ${ E } _{ s }=0$


Correct Option: A

Elasticity of supply is greater than one when _________.

  1. proportionate change in quantity supplied is more than the proportionate change in price.

  2. proportionate change in price is greater than the proportionate change in quantity supplied.

  3. change in price and quantity supplied are equal

  4. none of the above


Correct Option: A

Perfectly elastic supply means _________.

  1. ${ E } _{ s }>1$

  2. ${ E } _{ s }<1$

  3. ${ E } _{ s }=\infty $

  4. ${ E } _{ s }=0$


Correct Option: C

The concept of consumer's surplus is useful in _______.

  1. distinguishing between Value-in-use and value-in-exchange.

  2. comparing the advantages of different places.

  3. useful in cost benefit analysis of projects.

  4. all of the above


Correct Option: D

When price of a commodity increase from Rs.10 to Rs.12 per unit, its supply goes up from 100 units to 140 units, the elasticity of supply would be ____.

  1. $1$

  2. $2$

  3. $3$

  4. $4$


Correct Option: B

If a fall in price of 'Y' result in a decrease in the sale of 'X', the two goods appear to be _____________.

  1. substitutes goods

  2. complementary goods

  3. inferior goods

  4. neutral goods


Correct Option: A

When price of a commodity increase from Rs. 10 Rs. 12 per units, its supply goes up from 100 units to 140 units, the elasticity of supply would be _______.

  1. 1

  2. 2

  3. 3

  4. 4


Correct Option: B

The supply curve which is beginning at the origin has.

  1. A price elasticity of supply less than one

  2. A price elasticity of supply equal to one

  3. A price elasticity of supply more than one

  4. A positive price elasticity of supply


Correct Option: B

Supply is likely to be more price elastic ________,

  1. in the short run rather than the long run

  2. if factors of production are relatively immobile between industries

  3. if there are very few producers

  4. if it is easy to expand output


Correct Option: D

Percent increase in the price of sugar reduces sugar consumption by about 5 percent. The increase causes households to _____________.

  1. spend more on sugar

  2. spend less on sugar

  3. spend the same amount on sugar

  4. consume more goods like coffee and tea that are complements of sugar


Correct Option: A

Which one of the following labour resources will likely have the most inelastic supply schedule in the short run?

  1. Filling station attendants

  2. Sales clerks

  3. Construction labourers

  4. Dentist


Correct Option: D

 When the greater the elasticity of supply, the change in the new equilibrium price will _____________.

  1. be higher

  2. be higher than previous price

  3. be lower

  4. be lower than previous price


Correct Option: C

The _________ refers to the amount of a certain good producers are willing to supply when receiving a certain price.

  1. quantity demanded

  2. quantity purchased

  3. quantity supplied

  4. quantity sold


Correct Option: C

Usually, the demand for commodities, the consumption of which can be postponed, has an _________ demand as the prices rise and expected to fall again.

  1. elastic

  2. inelastic

  3. unitary

  4. All of above


Correct Option: A

The supply is said to be __________, when any change in price produces no change in the quantity supplied of a commodity.

  1. relatively more elastic

  2. perfectly elastic

  3. perfectly inelastic

  4. relatively Inelastic


Correct Option: C

The supply is ___________, when a small change in price causes a greater change in quantity supplied.

  1. relatively more elastic

  2. perfectly elastic

  3. perfectly inelastic

  4. relatively Inelastic


Correct Option: A

The formula for calculating price elasticity of supply is ________________.

  1. $\displaystyle E _s = \frac{percentage \,\, change \,\, in \,\, price}{percentage \,\, change\,\, in \,\, quantity\,\, demanded}$

  2. $\displaystyle E _s = \frac{percentage \,\, change \,\, in \,\, quantity\,\, demanded }{percentage \,\, change\,\, in \,\, quantity\,\, supplied}$

  3. $\displaystyle E _s = \frac{percentage \,\, change\,\, in \,\, quantity\,\, supplied }{percentage \,\, change\,\, in \,\, price}$

  4. $\displaystyle E _s = \frac{ percentage \,\, change \,\, in \,\, quantity \,\, demanded }{percentage \,\, change\,\, in \,\, price}$


Correct Option: C

The supply is said to be ____________, when a very insignificant change in price leads to an infinite change in quantity supplied.

  1. relatively more elastic

  2. perfectly elastic

  3. perfectly inelastic

  4. relatively Inelastic


Correct Option: B

The supply is ________, when a greater change in price leads to smaller change in quantity supplied.

  1. relatively more elastic

  2. perfectly elastic

  3. perfectly inelastic

  4. relatively inelastic


Correct Option: D

Relatively in inelastic supply means: _____________.

  1. $E _s > 1$

  2. $E _s <1$

  3. $E _s =1$

  4. $E _s=0$


Correct Option: B

Elasticity of supply refers to the degree of responsiveness of supply of a good to changes in its.

  1. Demand

  2. Price

  3. Cost of production

  4. State of technology


Correct Option: B
Explanation:

 Elasticity of supply measures the degree of responsiveness of quantity supplied to a change in own price of the commodity. It is also defined as the percentage change in quantity supplied divided by percentage change in price

The elasticity of supply is defined as the.

  1. Responsiveness of the quantity supplied of a good to a change in its price

  2. Responsiveness of the quantity supplied of a good without in its price

  3. Responsiveness of the quantity demanded of a good to a change in its price

  4. Responsiveness of the quantity demanded of a good without change in its price


Correct Option: A
Explanation:

1:The elasticity of supply is the responsiveness of the quantity supplied and the change in price.
2:The elasticity of supply
 is measured as the ratio of proportionate change in the quantity supplied to the proportionate change in price.

Elasticity of supply is measured by dividing the percentage change in quantity supplied of a good by __________.

  1. Percentage change in income

  2. Percentage change in quantity demanded of goods

  3. Percentage change in price

  4. Percentage change in taste and preference


Correct Option: C
Explanation:

Es$=\dfrac{\%\Delta Q}{\%\Delta P}$.
The elasticity of supply is measured by dividing the percentage change in quantity supplied of a good by the Percentage change in price


Elasticity of supply is zero means.

  1. Perfectly inelasticity supply

  2. Perfectly elastic supply

  3. Imperfectly elastic supply

  4. None of the above


Correct Option: A
Explanation:

Elasticity of supply is zero means perfectly inelastic supply $(Es = 0)$ and shape of curve will be vertical.

If the quantity supplied exactly equal to the relative change in price than the elasticity of supply is?

  1. Less than one

  2. Greater than one

  3. One

  4. None of these


Correct Option: C
Explanation:

If $\Delta Q=\Delta P$ the $Es=1$(one).
So if the quantity supplied exactly equal to the relative change in price than the elasticity of supply is 1

If the percentage change in supply is less then the percentage change in price it is called.

  1. Unit elasticity of supply

  2. Perfectly elastic supply

  3. More elastic supply

  4. Inelastic supply


Correct Option: D
Explanation:

If $\%$ $\Delta$Q $<$ $\%$ $\Delta$P then there is less then one elastic supply i.e., $e < 1$.
Supply is price elastic when the percentage change in quantity supplied is greater than the percentage change in price, and supply is price inelastic when the percentage change in quantity supplied is less than the percentage change in price.

If the price of apples rises from $Rs. 30$ per kg to $Rs. 40$ per kg and the supply increases from $240\ kg$ to $300\ kg$, Elasticity of supply is _________.

  1. $.75$

  2. $.67$

  3. $(-).67$

  4. $(-).75$


Correct Option: A
Explanation:

$Es = \dfrac {\triangle q}{\triangle p} \times \dfrac {p}{q}$
$\triangle q = (300 - 240) = 60$
$\triangle p = (40 - 30) = 10$
$= \dfrac {60}{10}\times \dfrac {30}{240}$
$= .75$.

If the price of bananas rises from $Rs. 10$ per dozen to $Rs. 15$ per dozen and the supply increases from $100$ dozens to $125$ dozens. Elasticity of supply is ______________.

  1. $.50$

  2. $.65$

  3. $(-).50$

  4. $(-).65$


Correct Option: A
Explanation:

$E _{s} = \dfrac {\triangle q}{\triangle p}\times \dfrac {p}{q}$
$= \dfrac {25}{5}\times \dfrac {10}{100} = 0.5$.

When supply of a commodity remain same with change in price, this situation is called as _____________.

  1. elastic supply

  2. inelastic supply

  3. perfectly elastic supply

  4. perfectly inelastic supply


Correct Option: D

If supply of a commodity falls by $20$% due to decrease in price of the commodity by $10$%, then elasticity of supply will be _______.

  1. elastic

  2. unit elastic

  3. perfectly elastic

  4. none of the above


Correct Option: A
Explanation:

When change in supply is higher than the change in price of the commodity, the supply is elastic.

Elasticity of supply for a positively sloping supply curve that starts from price axis is ______.

  1. zero

  2. greater than one

  3. less than one

  4. equal to one


Correct Option: B

In case of perfectly elastic supply, the supply curve is _________.

  1. rising

  2. horizontal

  3. falling

  4. vertical


Correct Option: B

If elasticity of supply becomes negative, supply curve is _________.

  1. negatively sloping

  2. positively sloping

  3. horizontal

  4. vertical


Correct Option: A

When supply curve is upward sloping and originates from the starting point, elasticity is __________.

  1. infinity

  2. less than one

  3. zero

  4. one


Correct Option: D
The supply of durable goods is usually _____________.
  1. more elastic

  2. less elastic

  3. perfectly elastic

  4. perfectly inelastic


Correct Option: A
If ${E} _{s}=0.6$, and the percentage change in price $=5$, then percentage change in quantity supplied is ______.
  1. $8.33$

  2. $4.4$

  3. $5.6$

  4. $3$


Correct Option: D
If 18% fall in price of the commodity causes 27% decrease in its supply, elasticity of supply will be _______.
  1. 1.5

  2. 0.5

  3. 0.67

  4. 2.5


Correct Option: A

 Write True or False with a reason.
When a firm is using some rigid technology, its ${E} _{s}$ tends to be high.

  1. True

  2. False


Correct Option: B
Explanation:

False. When a firm is using rigid technology ${E} _{s}$ tends to be low. Because, possibilities of variation in output are reduced.

 Write True or False with a reason.
If a straight line upward sloping supply curve shoots from the X-axis, elasticity of supply $>1$.

  1. True

  2. False


Correct Option: B
Explanation:

False. When a straight line upward sloping supply curve shoots from the X-axis, elasticity of supply $({E} _{s})< 1$

Write True or False with a reason.
In the long period, elasticity of supply tends to be lower than in the short period.

  1. True

  2. False


Correct Option: B
Explanation:

False. Longer the time period, greater will be the elasticity of supply. Because, over a long period of time, more and more factors are easily available and their input can be changed to increase (or decrease) output of the commodity.

 Write True or False with a reason.
If elasticity of supply $=0$, supply curve becomes a horizontal straight line.

  1. True

  2. False


Correct Option: B
Explanation:

False. If elasticity of supply $=0$, supply curve becomes a vertical straight line parallel to Y-axis.

 Write True or False with a reason.
If a straight line upward sloping supply curve shoots from the Y-axis, elasticity of supply $< 1$.

  1. True

  2. False


Correct Option: B
Explanation:

False. When a straight line upward sloping supply curve shoots from the Y-axis, elasticity of supply $({E} _{s}>1)$

Write True or False with a reason.
${E} _{s}=1$ only if supply curve forms a $\angle {45}^{o}$ at the origin. Is it true?

  1. True

  2. False


Correct Option: B

Write True or False with a reason.
If a straight line upward sloping supply curve shoots from the origin, elasticity of supply is always equal to one.

  1. True

  2. False


Correct Option: A
Explanation:

True. When a straight line upward sloping supply curve passes through the origin (no matter what the angle it forms), the elasticity of supply is equal to one.

In a situation of perfectly elastic supply, price of the commodity tends to remain constant, no matter demand increases or decreases.

  1. True

  2. False


Correct Option: A
Explanation:

True.
The price will remain unchanged under a perfectly elastic supply curve, no matter demand increases or decreases. This is because supply responds proportionately to the increase or decrease in demand, i.e., it only changes on the quantity axis, while, it is static on the price axis at a given price.

The responsiveness of the sellers to a particular change in the price of the commodity is termed as ___________. 

  1. elasticity of supply

  2. theory of demand

  3. theory of supply

  4. none of the above


Correct Option: A

The concept of elasticity of supply is a parallel concept to the concept of __________.

  1. theory of demand

  2. theory of supply

  3. elasticity of demand

  4. none of the above


Correct Option: C

The elasticity of supply is _________ when the change in the amount of supply is in exact proportion to the change in price.

  1. perfectly elastic

  2. perfectly inelastic

  3. unitary

  4. less elastic


Correct Option: C

A supply curve passing through any point on X axis (quantity) will have elasticity __________.

  1. less than 1

  2. more than 1

  3. just one

  4. zero


Correct Option: A

If a dealer is prepared to supply 1000 sets of a 29" Colour TV if the price is Rs. 12,000 per set, however if the price rises to Rs. 15,000 he is prepared to supply 1,500 pieces. The elasticity of supply of the TV set is _______.

  1. 1

  2. 2

  3. 0.75

  4. 1.4


Correct Option: B

A 6% decrease in price has caused 9% decrease in quantity supplied, the price elasticity of supply will be _________.

  1. 1.33

  2. -1.33

  3. 1.5

  4. -0.66


Correct Option: C

A 6% increase in price has caused 8% increase in quantity supplied, the price elasticity of supply will be _________.

  1. 1.33

  2. -1.33

  3. 0.66

  4. -0.66


Correct Option: A

The supply function is given as: Q= -100 + 10P.

Find the elasticity using point method, when price is Rs. 15.

  1. 4

  2. -3

  3. -5

  4. 3


Correct Option: D
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