AP EAMCET202022 Sep 2020Morning ShiftPhysicsThermodynamicsActual
An electrical refrigerator with =5 extracts 5000 ~J from the contents of the refrigerator. During this process, find the electrical energy utilised by its motor.
Options
- A1 ~kJ
- B0.5 ~kJ
- C0.8 ~kJ
- D1.2 ~kJ
Correct answer
A. 1 ~kJ
Step-by-step solution
Coefficient of performance of refrigerator, =5 Amount of heat removed, Q=5000 ~J Electrical energy utilised by the motor aligned & & = Work done by the motor (W) & & = Q W & W & = Q = 5000 5 =1000 ~J =1 ~kJ aligned