Question

EXPLAIN JOULE'S LAW ,,,

Answer 1

Joule's law states that:
The quantity of heat(H) generated in a conductor of resistance(R) when current (I) flows through it for time(t) is directly proportional to
Square of the current, Resistance of the conductor and time i.e I²Rt

Answer 2

JOULE'S LAW:=IT STATES THAT WHEN AN ELECTRIC CURRENT PASSES THROUGH A CONDUCTOR IT RELEASES HEAT. 
THE EQUATION OF IT IS 
H(HEAT)=I²RT