A parallel plate capacitor having capacitance `0.5mu` is taken. Plates are given charges as shown in the figure. When key is open the energy stored in capacitor is `U_(1)` % when key is closed the enrgy stored bucome `U_(2)` Find. `(U_(1))/(U_(2))` ?

A parallel plate capacitor having plate area A and separation between the plates d is charged to potential V .The energy stored in capacitor is ....???

The capacity of a parallel plate air capacitor is 10 mu F and it is given a charge of 40 mu C . The electrical energy stored in the capacitor is

The parallel plate capacitors shown in the Figure have capacitance C_(1) = C and C_(2) = 2C . The switch S is opened. Energy stored in the capacitor system is U_(1) . Now the separation between the plates of C_(1) is slowly reduced to half its original value. Energy stored in the capacitor system now changes to U_(2) . (a) Which will be larger - U_(1) or U_(2) ? Why ? (b) Calculate work done by the external agent in slowly reducing the distance between the plates of C_(1) . (c) If the plate separation of C_(1) is reduced to half and simultaneously the separation between plates of C_(2) is doubled, will the energy stored in the capacitor system increase or decrease? Quantify the change in energy.

A parallel plate capacitor of capacitance C is charged to a potential V. It is then connected to another uncharged capacitor having the same capacitance. Find out the ratio of the energy stored in the combined system to that stored initially in the single capacitor.

A parallel plate capacitor of capacitance C is charged to a potential V. It is then connected to another uncharged capacitor having the same capacitance. Find out the ratio of the energy stored in the combined system to that stored initially in the single capacitor.

A parallel plate capacitor of capacitance C is charged to a potential V. It is then connected to another uncharged capacitor having the same capacitance. Find out the ratio of the energy stored in the combined system to that stored initially in the single capacitor.

The capacitance of a charged capacitor is C and the energy stored in it is U. What is the value of charge on the capacitor?