A 5ºC rise in temperature is observed in a conductor by

Home » Electricity and Magnetism » Current Electricity » Question

A 5ºC rise in temperature is observed in a conductor by passing a current. When the current is doubled the rise in temperature will be approximately

1. 10ºC
2. 16ºC
3. 20ºC
4. 12ºC

Correct Option: C

Since H ∝ I², doubling the current will produce 4 times heat. Hence, the rise in temperature will also be 4 times i.e., rise in temperature = 4 × 5 = 20ºC.