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Q.

If the current passing through a conductor is doubled, the heat produced will become [[1]].

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Detailed Solution

If the current passing through a conductor is doubled, the heat produced will become four times.
When current flows through a resistor, heat is produced due to friction called the heating effect of electric current or joules law of heating effect, which can be written as

H = I^{2} Rt

, Where

H = heat produced; I = current flowing inside a conductor; R = resistance, and t = time .

From this relation, we can say heat produced in a conductor is directly proportional to the square of the current flowing through it. So, if we put

I = 2 I

in the above equation while all parameters remain constant then the heat produced is

H' = {(2 I)}^{2} R t .

H' = 4 I^{2} Rt

H' = 4 H

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If the current passing through a conductor is doubled, the heat produced will become [[1]].