Question

state the joules law of heating. derive the expression for the same

Answer 1

i.e., H = V I t = I2Rt. this energy is dissipated as heat energy. This relationship is also known as Joule's Law of Heating.

Answer 2

Answer:

Joules law of heating(H)=i^2Rt

where, i=amount of current

R=resistance

t=time

Step-by-step explanation:

1. Suppose a resistor R is connected to a cell.The cell maintains a potential difference V across the resistor, driving a current I through it.So,

V=iR ................(1)

2.Also we know,

U=QV ...............(2)

3.And the charge that passes through the wire in time t is

Q=it .............(3)

4.Using equation (1) and (3) in equation(2),

U=QV

=(it)(iR)

=i^2Rt

HENCE PROVED.