Question

State and prove the joule's law of heating?

Answer 1

Answer:

Explanation:

a) according to joules law heat produced by the appliance is directly proportional to square of current

H directly prop to i² ------- (1)

b) heat produced by a plant is directly proportional to resistance of wire

H directly prop to R ------ (2)

c) heat produced by appliance is directly proportional to time up to which electric current flow through to it

H directly prop to R ------- (3)

After combining equation 1, 2 and 3

H directly prop to i².R.T

H = K.i².R.t

K = 1

H = I²×R×t

Hence Proved