Arefrigerator is removing heat from a cold medium at 3∘c at a rate of 5400 kj/h and rejecting the waste heat to a medium at 30∘c. if the coefficient of performance of the refrigerator is 2, the power consumed by the refrigerator is
(a) 0.5 kw
(b) 0.75 kw
(c) 1.0 kw
(d) 1.5 kw
(e) 3.0 kw

(b) 0.75 kW

Explanation:

Given

temperature of cold region

Heat removal at the rate of

temperature of hot region

COP of refrigerator =2

COP of a refrigerator is given by ratio of desired effect to the Power input

COP

b.transmitters send radio waves, and receivers capture radio waves.

b.

hope this : )