Question

Is work done by a battery always equal to the thermal energy developed in electrical circuit? What happens if a capacitor is connected in the circuit?

Answer 1

Answer:

No the work done by a battery not equal to the thermal energy developed in electrical circuit.during the Charing of capicator 12CV square of energy is lost into the form of heat.

Answer 2

No, in an electrical circuit the work done by a battery is not always equal to the thermal energy developed.

Explanation:

• When an ideal battery is connected in the circuit, the work done by the battery is the sum of the thermal energy developed in the circuit and the thermal energy developed in the internal resistance of the battery.
• If a capacitor is connected, work done in the circuit is equal to the CV2.  An amount of energy is equal to 1/2CV2 is stored in it when the capacitor is fully charged which is a form of electrical energy.  
• During the charging period of the capacitor, 1/2CV2 is lost in the form of heat and electromagnetic radiation.