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Flow of Heat

Which of the ...

Question

Which of the following statements about a refrigerator is/are correct?
1.It converts electrical energy into heat energy.
2.It converts electrical energy into mechanical energy.
3.It transfers heat from a high temperature to a low temperature.
4.It transfers heat from a low temperature to a high temperature.

A

1 and 3

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B

2 and 3

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C

1 and 4

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D

4 only

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Solution

The correct option is C 1 and 4
Option: (c)

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Similar questions

Q. Consider the following statements:
1. Heat is a form of energy.
2. Heat flows from low temperature to high temperature.
3. Heat flows from high temperature to low temperature.
Which of the above statement(s) is/are correct?

Q. Assertion :It is impossible to create a heat engine which takes heat energy from a reservoir and completely converts it into work. Reason: Heat energy cannot flow from lower temperature to higher temperature by itself.

Q. Considering an ideal refrigerator, heat from its inside at a temperature of

277 K

is transferred to a room at temperature of

300 K

. Find the amount of heat extracted for each Joule of electrical energy consumed by refrigerator.

Q. Considering an ideal refrigerator, heat from its inside at a temperature of

277 K

is transferred to a room at temperature of

300 K

. Find the amount of heat extracted for each Joule of electrical energy consumed by refrigerator.

Q. Consider the following statements.

1.

A heat engine is a device which converts heat energy into mechanical energy.

2.

A heat engine essentially consists of source of heat at higher temperature, working substance and sink of heat at lower temperature.

3.

In a diesel engine, a mixture of fuel vapours and air acts as the working substance.

4.

Efficiency of a petrol engine is greater than diesel engine.
Which of the statements given above are correct?

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