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Question (11)
QN0038448

A Carnot's engine working between  and  has a work output of  per cycle. The amount of 

heat energy supplied to the engine from the source in each cycle is:          

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: D
Explanation:

Amount of heat energy supplied to the engine from the source, .

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Question (12)
QN0038449

A Carnot engine whose efficiency is  has an exhaust temperature of . If the efficiency is to 

be  with the same intake temperature, the exhaust temperature must be (in  )        

  • (A)

    800

  • (B)

    200

  • (C)

    400

  • (D)

    600

Correct Answer: C
Explanation:

or

Also,

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Question (13)
QN0038450

A Carnot engine is working between  and . The increase in efficiency will be maximum when the temperature of         

  • (A)

    the source is increased by 

  • (B)

    the sink is decreased by 

  • (C)

    source is increased by  and that of  is decreased by 

  • (D)

    both source and sink are decreased by  each.

Correct Answer: B
Explanation:

is maximum in case (b).

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