Question

Name two electrical devices which produce heat as well as light.

Answer 1

1. Different electrical appliances work on the principle of the heating effect of current.
2. Heat is produced in a conductor if a current is flown in it.
3. Heat produced in a circuit is given by$H=I^{2}Rt$, where H is heat produced, t is the time taken and I is the current flown in the circuit.
4. Production of heat sometimes leads to the production of light as well.
5. Some devices which produce heat, as well as light, are Electric bulbs and Halogen lamps.