Question

A) define 1 kwh and establish its relation with joule (b) an electric heater is rated 11500w. How much energy does it use in 10 hours

Answer 1

a) 1KWh is the energy used in one hour at the rate of 1000Js-^1.

1KWh = 3.6 ×10^6 joules.

b) energy = 11500/10

1150w