The condenser used in the tuning circuit of a radio receiver is:
The capacity of a condenser A is 10μF and it is charged using a battery of 100 V. The battery is disconnected and the condenser A is connected to a condenser B with common potential as 40 V. The capacity of B is:
A condenser of 1μF is charged to a potential of 1000 volt. The energy stored in the condenser is :