Question

state the factor on which the heat produced in a current carrying conductor depends? give one particle application of this effect

Answer 1

Heat H of a conductor depends on the following factors by proportionality like this―

★ ( here I. am using the sign of infinity as a proportionality sign ) ★

H ∞ I (current)

H ∞ t (time)

H ∞ R (resistance)

H ∞ V (Potential difference).

Answer 2

When current flows through a conductor, heat energy is generated in the conductor. The heating effect of an electric current depends on three factors:

The resistance, R of the conductor. A higher resistance produces more heat.

The time, t for which current flows. The longer the time the larger the amount of heat produced

The amount of current, I. the higher the current the larger the amount of heat generated.

Hence the heating effect produced by an electric current, I through a conductor of resistance, R for a time, t is given by H = I2Rt. This equation is called the Joule’s equation of electrical heating.

Electrical energy and power

The work done in pushing a charge round an electrical circuit is given by w.d = VIt

So that power, P = w.d /t = VI

The electrical power consumed by an electrical appliance is given by P = VI = I2R = V2/R

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