What are the heating effects of Electric Current

Dear student,

The heating effect of current is defined by Joules Law of heating. It states that the heat 'H' produced by a resistor of resistance 'R' due to current 'I' flowing through it for time 't' is:

H = i 2 Rt

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.

Some appliances using heating effect of current

1 Room heater

2. Electric bulb

3. Electric Iron

4. Electric fuse


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Dear student,

When electric current is pass through a wire, wire become hot and produce heat in the form of energy, it is known as heating effect of the current.
We define this energy as the amount of energy that is dissipated in the resistor in the form of heat.
Hence, heat produced
H = Pt
= VIt
= I^2Rt

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