Question

Define efficiency of a machine. Write its S.I. uni​

Answer 1

Answer:

of a body is defined as the rate of doing work by the body. The S.I. unit of power is joule per second that is nothing but watt (W).

Answer 2

Answer:

Power of a body is defined as the rate of doing work by the body. The S.I. unit of power is joule per second that is nothing but watt (W).