Question

When current in conductor us doubled keeping ither parameter same the heating effect will increase by?

Answer 1

Ohm's law states that the electrical current (I) flowing in an circuit is proportional to the voltage (V) and inversely proportional to theresistance (R). Therefore, if the voltage isincreased, the current will increase provided the resistance of the circuit does not change.

Answer 2

We know that the heat produced in a conductor is H = I²Rt where I is the current flowing, R is the resistance of the conductor and t is the time for which current is flowing in the conductor.

When electrical resistance R and time period t {other parameters} is kept constant then,

H(heating effect)is directly proportional to I²(current)

H = I² (keeping other parameters constant)

H = (2 I)² (when current is doubled)

H = 4 I²

So if the current is doubled then the heating effect through a conductor becomes four times of the original