A capacitor of capacitance `5muF` is charged with `5muC` charge its capacitance is changed to `2muF` by some external agent. The work done by external agent is

A capacitor A of capacitance 4muF is charged to 30V and another capacitor B of capacitance 2muF is charged to 15V . Now, the positive plate of A is connected to the negative plate of B and negative plate of A to the positive plate of B . find the final charge of each capacitor and loss of electrostatic energy in the process.

A capacitor of capacitance 15 muF has a charge 30 muC and stored energy is W. If charge increased to 60 muC the energy stored will be.

A capacitor of capacitance 15 muF has a charge 30 muC and stored energy is W. If charge increased to 60 muC the energy stored will be.

A capacitor C_1 of capacitance 5muF is charged to a potetntial of 100V and another capacitor C_2 of capacitance 8muF is charged to 50V. The positive and negative plates are mutually connected. Amount of charge of the capacitor C_2 after combination will be