Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 44

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A charge $Q .$ is given to a conducting sphere of radius $R .$ The total energy stored is

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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 2.5>Q 45

Two cylindrical capacitors has radii of inner and outer plates as

(a, b)

and

(c, d)

respectively. If they have same length and same capacitance, then

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 46

Two parallel plates have charges

Q_{1}

and

Q_{2}

on them and the capacitance is

C .

The potential difference between them is

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 47

In a spherical capacitor with plate radii

a

and

b,

the potential difference between the plates is

V .

The electric field between the plates at a radial distance

r

from centre is

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 48

In a cylindrical capacitor with plate radii

a

and

b,

the potential difference between the plates is

V .

The electric field between the plates at a radial distance

r

from axis is

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 49

Two parallel plates have area

A

and separation

d .

They are given charges

q_{1}

and

q_{2} .

They repel each other by a force

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 50

The heat generated in the circuit after closing the switch is

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 51

A parallel plate capacitor is charged by a battery of emf

V

volts. Work done by battery is

W .

Gain in energy of capacitor is

U

and heat dissipated in lead wires is

H .

Then

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Gamma Question Bank for Engineering Physics>Chapter 16 - Electrostatic Potential and Capacitance>EXERCISE 2.5>Q 52

A capacitor of capacitance

C

is charged to a potential difference

V

from a cell and then disconnected from it. A charge

+ Q

is now given to its positive plate. The potential difference across the capacitor is now