A variable capacitor is kept connected to a `10V` battery.If the capacitance of the capacitor is changed from `7 mu `F to `3 mu` F .the work done is `x times10^(-4)` J.What is the value of `x`?

A 5mu F capacitor is connected to a 200 V, 100 Hz ac source. The capacitive reactance is

In the circuit shown in the figure four capacitors are connected to a battery. The p.d across the 7 mu F capacitor is 6V . .

Three capacitors are connected across a 45 V power supply as shown in fig.what is the charge on the 6 mu F capacitor?

A capacitor with capacitance 5mu F is charged to 5 mu C . If the plates are pulled apart to reduce the capacitance to 2 mu F , how much work is done?

A capacitor is connected to a 20V battery and 10 ohm resistance. The potential difference across the capacitor rises from 0V to 2V in 10 mu s . Find capacitance of capacitor (given ln(10/9) = 0.105 )

A capacitor having a capacitance of 200 mu F is charged to a potential difference of 20V. The charging battery is disconnected and the capacitor is connected to another battery of emf 10V with the positive plate of the capacitor joined with the positive terminal of the battery. (a) Find the charges on the capacitor before and after the reconnection in steady state. (b) Find the net charge flown through the 10 V battery Is work done by the battery or is it done on the battery? Find its magnitude. (d) Find the decrease in electrostatic field energy. (e) Find the heat developed during the flow of charge after reconnection .

A capacitor of capacitance 6 mu F is connected with an emf sourface 3 V. Electrostaci energy stored in the capacitor is

A capacitor is connected to a 12 V battery through a resistance of (10Omega) .It is found that the potential difference across the capacitor rises to 4.0 V in 1(mu)s. find the capacitance of the capacitor.

Three capacitors are connected across a 45V power supply as shown in fig.what is the charge on the 6 mu F capacitor? qquad 4 mu F 6 mu F =45%^(@)

An 8 (mu)F capacitor is connected across a 220 V, 50 Hz line. What is the peak value of charge through the capacitor?