Question

Which device maintains a body at a temperature lower than the temperature of the surroundings?
1. Heat pump
2. Refrigerator
3. Both a and b are correct
4. Neither a nor b

Answer 1

Correct Answer - Option 2 : Refrigerator

CONCEPT:

S.No.	Refrigerator	Heat pump
1.	A refrigerator is a device that maintains a system or a body at a temperature lower than the surrounding temperature.	A heat pump is a device that maintains a system or a body at a temperature higher than the surrounding temperature.
2.	In the refrigerator, the heat is removed from the low-temperature body and is rejected to the high-temperature body.	In the heat pump, the heat is removed from the low-temperature body and is added to the high-temperature body.
3.	Generally, the surrounding atmosphere acts as the high-temperature body for a refrigerator.	Generally, the surrounding atmosphere acts as the low-temperature body for a heat pump.

EXPLANATION:

• From the above, it is clear that a refrigerator is a device that maintains a system or a body at a temperature lower than the surrounding temperature.
• Hence, option 2 is correct.