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Two identical capacitors $1$ and $2$ are connected in series. The capacitor $2$ contains a dielectric slab of constant $K$ as shown. They are connected to a battery of emf $V_{0}$ volts. The dielectric slab is then removed. Let $Q_{1}$ and $Q_{2}$ be the charge stored in the capacitors before removing the slab and $Q'_{1},$ and $Q'_{2}$ be the values after removing the slab. Then

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Important Questions on Electrostatic Potential and Capacitance

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.7>Q 78

Two capacitors of capacitances

1.0

microfarad and

2.0

microfarad are each charged by being connected across a

5.0

-volt battery. They are disconnected from the battery and then connected to each other with resistive wires so that plates of opposite charge are connected together. What will be the magnitude of the final voltage across the

2.0

-microfarad capacitor?

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.7>Q 79

A capacitor is charged with a di-electric slab in the space between the plates of capacitor. The battery is disconnected and the di-electric slab is pulled out of the space. Then the force of capacitor upon slab

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>Assignment Set-2>Q 1

Find the electrostatic potential energy of the system shown in the figure.

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>Assignment Set-2>Q 2

Two charges

q

and

- q

are placed at

(a, 0)

and

(- a, 0)

on the

x -

axis. Another charge

2 q

is taken from

(0, 0)

(0, a)

, then the work done to do so

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>Assignment Set-2>Q 3

In moving a unit positively charged body from point

A

to point

B

, external work done is

40 J

and body acquires a kinetic energy of

20 J .

The potential difference,

V_{B} - V_{A}

, is

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>Assignment Set-2>Q 4

A charge of

5 nC

is uniformly distributed on a ring of radius

4 cm .

Find the potential at the axis at a distance of

3 cm

from the centre.

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>Assignment Set-2>Q 5

In which of the following case, potential at point

O

is not zero?

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>Assignment Set-2>Q 6

In any region, if electric field is define as

\vec{E} = (\hat{i} + 2 \hat{j} + \hat{k}) V / m

, then the potential difference between two points

A (0, 0, 0)

and

B (2, 3, 4)

in that region, is

Important Questions on Electrostatic Potential and Capacitance

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