(a) Power of a body is one watt when rate of consumption of energy is 1 joule per second.

(b) P = E / t = 1000 / 10 = 100 W

(a) Power of a body is one watt when rate of consumption of energy is 1 joule per second.

(b) P = E / t = 1000 / 10 = 100 W