heat generated in a capacitor circuit

A capacitor of capacity 2muF is charged to 100 V . What is the heat generated when this capacitor is connected in parallel to an another capacitor of same capacity?

Initially the circuit is in steady state. When the switch S is closed, the heat generated in the circuit will be

A capacitor having initial charge q_0 = CE//2 is connected to a cell of emf E through a resistor R as shown. Find the total heat generated in the circuit after the switch S is closed.

A capacitor having initial charge q_0 = CE//2 is connected to a cell of emf E through a resistor R as shown. Find the total heat generated in the circuit after the switch S is closed.

Three capacitors each of capacitance C = 2muF are connected with a battery of emf 30 V as shown in the figure . When the switch S is closed , the heat generated in the circuit will be

Three capacitors each of capacitance C = 2muF are connected with a battery of emf 30 V as shown in the figure . When the switch S is closed , the heat generated in the circuit will be

Find charge flown through battery and heat generated in the circuit after shifting switch from S_1" to "S_2.