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Explain application of heating effect of current

Dear Student ,
Following are some of the uses of heating effect of current:

  1. The working principle of a fuse wire is based on the heating effect of current. When high current flow through the fuse (current higher than the rated value) then the heat developed in the wire melts it and breaks the circuit.
  2. In electric iron, electric heat the heating effect of current is used.
  3. In an incandescent electric bulb (bulb with filament) the heating effect of current is used to produce light.
Regards

  • 1
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Dear friend

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

= I2Rt

Hence, we get the amount of heat dissipated in a resistor of resistance (R) for a current (I) as

?

This is called?Joule?s law of heating.?This law suggests that heat produced in a resistor is directly proportional to the

square of the current flowing through the resistor i.e.,?H?I2resistance of the resistor i.e.,?H?Rtime for which the current flows through the resistor i.e.,?H?t

Thus, we can infer from Joule?s heating effect that an appliance that offers more resistance to the flow of electrons releases more heat per unit time, keeping the potential of the source constant.

Regards.
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