Home
Class 11
PHYSICS
A refrigerator is to maintain eatables k...

A refrigerator is to maintain eatables kept inside at `9^(@)C`, if room temperature is `36^(@)C`. Calculate the cofficient of performance.

Text Solution

Verified by Experts

Temperature inside the refrigerator, `T_(1)=9^(@)C=282K`
Room temperature, `T_(2) = 36^(@)C = 309 K`
Coefficient of performance`=(T_(1))/(T_(2)-T_(1))`
`=(282)/(309-282)`
`=10.44`
Therefore, the coefficient of performance of the given refrigerator is 10.44.
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER

    NCERT|Exercise EXERCISE|22 Videos

  • UNITS AND MEASUREMENT

    NCERT|Exercise QUESTION|1 Videos

Similar Questions

Explore conceptually related problems

A refrigerator is to maintain eatables kept inside at 7^(@)C . The coefficient opf performance of refrigerator if room temperature is 387^(@)C is

" An ideal refrigerator is used to transfer heat from a freezer at "-23^(@)C" to the surroundings at "27^(7)C" .Its coefficient of performance is :- "

In a mechanical refrigerator the low -temperature coils are at a temperature of -13^(@)C and the compressed gas in the condenser at a temperature 27^(@)C . What is the theoretical coefficient of performance.

An ideal refrigerator is used to transfer heat from a freezer at -23^@C to the surrounding at 27^@C . Its coefficient of performance is

In a mechanical refrigerator, the low temperature coils are at a temperature of -23^(@) C and the compressed gas in the condenser has a temperature of 27^(@)C . The theoretical coefficient of performance is :-

In a mechanical refrigerator the low temperature coils are at a temperature of -23^(@)C and the compressed gas in the condenser has a temperature of 27^(@)C . The theoretical coefficient of performance is

A body of emissivity (e = 0.75) , surface area of 300cm^(2) and temperature 227^(@)C is kept in a room at temperature 27^(@)C . Calculate the initial value of net power emitted by the body.

In a refrigerator, heat from inside at 277 K is transferred to a room at 300K . What is the cofficient of performance of the refrigerator. How many joule of heat will be deliverd to the room for each joule of electric energy consumed ideally?