# what is heating effect in electric current ?

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

• 17

Electric current is actually the flow of electrons in the conducting material. Now, when these electrons flow, they encounter some resistance in the structure of the conductor, which accounts for the "resistance" of materials. As the electrons collide or vibrate, heat energy is generated depending on the resistance of the conductor. This overall effect is called heating effect of electrical current.

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WHEN ELECTRICITY PASSES THROUGH A COIL OF WIRE IT BEHAVES LIKE A MAGNET . IT IS THE HEATING EFFECT OF ELECTRIC CURRENT .

HOPE IT HELPS................

• -9

WHEN ELECTRICITY PASSES THROUGH A COIL OF WIRE IT GETS HEATED . THIS IS THE HEATING EFFECT OF ELECTRIC CURRENT . THIS METHOD IS USED IN ELECTRIC WATER HEATERS , ELECTRIC COOKERS etc..

HOPE IT HELPS..

• -6

When electric charges move through a wire, they lose some of the energy to the atoms in the wire. On receiving the energy, The atoms vibrate more and more causing the wire to heat up. Some of the Electric Energy is changed to heat energy. The higher the resistance the more the heat energy. The amount of heat generated is governed by Joule's first law:

Q = I2·R·t

where Q is the heat, I is the current, R is the resistance, and t is the time. If I is given in amperes, R in ohms, and t in seconds, the units of energy for the heat will be in Joules.When electric charges move through a wire, they lose some of the energy to the atoms in the wire. On receiving the energy, The atoms vibrate more and more causing the wire to heat up. Some of the Electric Energy is changed to heat energy. The higher the resistance the more the heat energy. The amount of heat generated is governed by Joule's first law:

Q = I2·R·t

where Q is the heat, I is the current, R is the resistance, and t is the time. If I is given in amperes, R in ohms, and t in seconds, the units of energy for the heat will be in Joules.

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