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If a heat engine absorbs 2 KJ heat from ...

If a heat engine absorbs `2 KJ` heat from a heat source and release `1.5 KJ` heat into cold reservoir, then it's efficiency is

A

`0.5%`

B

`75%`

C

`25%`

D

`50%`

Text Solution

Verified by Experts

The correct Answer is:
c
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Knowledge Check

  • If a heat engine absorbs 50 KJ heat from a heat source and has an efficiency of 40%, then the heat released by it in heat sink is

    A
    40 KJ
    B
    30 KJ
    C
    20 KJ
    D
    20 J

  • A carnot engine takes heat from a reservoir at 627^(@)C and rejects heat to a sink at 27^(@)C . Its efficiency is

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    `3//5`
    B
    `1//3`
    C
    `2//3`
    D
    `200//209`

  • In a carnot heat engine 8000J of heat is absorbed from a source at 400 K and 6500 J of heat is rejected to the sink. The temperature of the sink is ………. .

    A
    325 K
    B
    100 K
    C
    200 K
    D
    273 K

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    A heat engine operates between a cold reservoir at tempreture T_(2)=300 K and a hot reservior at tempreture T_(1) . It takes 200 J of heat from the hot reservior and delivers 120 J of heat to the cold reservior in a cycle. What could be the minimum tempreture of the hot reservior ?

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