Question

what is the joules heating effect ?how can it be demonstrated experimentally

Answer 1

H=I^RT
H is directly proportional to I^
H is directly ,,,,,,,,,.... to R
H.,,,,,.. . .......to T

Answer 2

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Q: what is the joules heating effect ?how can it be demonstrated experimentally?
$\bold {\huge {\ulcorner {Ans:-}}}$ The heating effect of current is defined by Joules Law of heating. It states that the heat $\bold {'H '}$ produced by a resistor of resistance $\bold {'R '}$ due to current $\bold {'I '}$ flowing through it for time $\bold {'t '}$ is:

$\bold {H = i^2Rt}$

In a conductor when an electric field is applied across its ends, the free electrons available in it start drifting along the electric field. These electrons collide with the atoms which have lost the electrons. As a result of these collisions some energy of the electrons is transferred to the atoms which vibrate violently as they gain energy. Thus, heat is developed in the conductor.
Greater the current, greater will be the rate of collision and so greater will be the heat produced.