- Introduction
- |
- Calculation of capacitance
- |
- Parallel plate capacitor
- |
- Cylinderical capacitor
- |
- Spherical capacitor
- |
- Capacitors in series and parallel combinations
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- Energy stored in a capacitor
- |
- Effect of Dielectric

Capacitance of a parallel plate air capacitor depends on

- Thickness of conducting plates
- Charge on the conducting plates
- Area of the conducting plates
- Distance of separation between the conducting plates

Equivalent capacitance of system of capacitors shown below in the figure is

- C/2
- 2C
- C
- None of these

A parallel plate air capacitor with no dielectric between the plates is connected to the constant voltage source. How would capacitance and charge change if dielectric of dielectric constant K=2 is inserted between the plates. C

- C=C
_{0}/2 ; Q=2Q_{0} - C=2C
_{0 }; Q=Q_{0}/2 - C=C
_{0}/2 ; Q=Q_{0}/2 - C=2C
_{0 }; Q=2Q_{0}

A parallel plate capacitor of capacitance C is connected to a battery and is charged to a potential difference V. Another capacitor of capacitance 2C is similarly charged to a potential difference 2V. The charging battery is then disconnected and the capacitors are connected in parallel to each other in such a way that the positive terminal of one is connected to the negative terminal of the other. The final energy of the configuration is

- Zero
- 3CV
^{2}/2 - 25CV
^{2}/6 - 9CV
^{2}/2

A parallel plate air capacitor is connected to a battery. The quantities charge, voltage, electric field, and energy associated with this capacitor are given by Q

- Q> Q
_{0} - V> V
_{0} - E> E
_{0} - U> U
_{0}

The effective capacitance of a capacitor is reduced when capacitors are connected in

- series
- parallel
- series-parallel combination
- none of the above

Two identical conducting plates of plate area A are separated by a distance d to form a parallel plate air capacitor. Now a metal sheet of thickness d/2 is inserted between the plates of the capacitor. The ratio of capacitance before the insertion of plate and after the insertion of plate is

- 1:2
- 1:1
- 1:2
- √2:1

The plates of a parallel plate air capacitor are charged to 100 V. A 2mm plate is inserted between the plates of the capacitor. To maintain the same potential difference , the distance between the capacitor plates is increased by 1.6mm. The dielectric constant of the plate is

- 1.25
- 5
- 2.5
- 4

Four capacitors are connected as shown below in the figure

Here C

- 1.245 μF
- 4.446 μF
- 9 μF
- 3.27 μF

Consider the figure and value of capacitances given in the Question 9 if a 4Volt battery is connected between points A and B total charge stored on the capacitors would be

- 13.8μC
- 10 μC
- 22 μC
- 4 μC

Class 12 Maths Class 12 Physics

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