Question

An electric motor operating on 15 V supply draws a current of 5 A and yields mechanical powers of 60 W. The energy lost as heat in one hour( in KJ) is how much?​

Answer 1

Answer:

E=V×I

so

15×5=75w

60w is the energy consumed by the mortor

so energy waste on heat is

75w-60w=15w

Answer 2

Output power = 60W Power lost = 15W
Energy lost
=54000J =54kJ