Question

state joules law of heating. explain the working of electric filament bulb​

Answer 1

Answer:

Joule's law of heating states that the power of heating generated by an electrical conductor is proportional to the product of it's resistance and the square of the electric current passing through the conductor .

Answer 2

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Joules law of heating:

Joule’s law states that “the heat per unit time developed in the wire is proportional to the resistance of the wire and to the square of the current”. In mathematical form:

$\frac{H}{t} = {I}^{2} R$

where:

• H is the heat produced by the conductor, [in Joules]

• I is the electrical current flowing through the conductor, [in amperes]

• R is the electrical resistance, [in ohms]

• t is the elapsed time, [in seconds]

Working of Electric Filament bulb:

An electric bulb works on the principle of hearing effect of current. It consists of a tungsten filament with a coating of thorium. This filament gets heated up to emit light when current passes through it.

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