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The coeffcient of performance of a refri...

The coeffcient of performance of a refrigerator working between `10^(@)C` and `20^(@)C` is

A

28.3

B

29.3

C

2

D

Can not be calculated

Text Solution

Verified by Experts

The correct Answer is:
A
Given , `T_(1)=273+20=293K,T_(2)=273+10=283K`
`therefore` Conefficient performance
= `(T_(2))/((T_(1)-T_(2)))=(283)/(293-283)=(283)/(10)=28.3`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-KINETIC THEORY OF GASES ANDRADIATION-Exercise 1
  1. A carnot's engine works between a source at a temperature of 27^(@)C a...

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  2. A engine has an efficiency of 1//3. The amount of work this engine can...

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  3. The coeffcient of performance of a refrigerator working between 10^(@)...

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  4. A Carnot engine used first ideal monoatomic gas and then an ideal diat...

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  5. A body having 110 and70^(@)C temperatures of surrounding and of itsel...

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  6. What is the source temperature of the carnot engine reuired to get 70 ...

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  7. A carnot engine operates with source at 127^(@)C and sink at 27^(@)C. ...

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  8. A carnot engine has efficiency 1//5 . Efficiency becomes 1//3 when tem...

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  9. A Carnot engine, whose efficiency is 40%, takes in heat from a source ...

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  10. A Carnot engine, whose efficiency is 40%, takes in heat from a source ...

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  11. A refrigerator works between temperature of melting ice and room tempe...

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  12. A Carnot engine whose source is at 400 K takes 200 cal of heat and rej...

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  13. A Carnot's engine has an efficiency of 50 % at sink temperature 50^(@...

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  14. An ideal gas heat engine operates in a carnot cycle between 227^(@)C ...

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  15. A Carnot reversible engine converts 1//6 of heat input into work . Whe...

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  16. Consider the statement (A) and (B) and identify the carrect answers. ...

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  17. Solar radiation emitted by sun resembles that emitted by a body at a t...

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  18. The energy emitted per second by a black body at 27^(@)C is 10 J. If t...

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  19. The temperature of coffee in a cup with time is most likely given by ...

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  20. A surface at temperature T(0)K receives power P by radiation from a sm...

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