Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 41

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A hollow metal sphere of radius $10 cm$ is charged such that the potential on its surface becomes $80 V$ . The potential at the centre of the sphere is

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Important Questions on Electrostatic Potential and Capacitance

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 42

Charge

q_{2}

is at the centre of a circular path with radius

r .

Work done in carrying charge

q_{1}

once around this equipotential path, would be

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 43

An electric dipole of dipole moment

p

is placed in the position of stable equilibrium in uniform electric field of intensity

E .

This is rotated through an angle

θ

from the initial position. The potential energy of the electric dipole in the final position is

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 24

There is an electric field

E

in

x -

direction. If the work done on moving a charge of

0.2 C

through a distance of

2 m

along a line making an angle

60 °

with

x -

axis is

4 J

then what is the value of

E

?

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 45

Two metallic spheres of radii

1 cm

and

2 cm

are given charges

10^{- 2} C

and

5 \times 10^{- 2} C

, respectively. If they are connected by a connecting wire, the final charge on the smaller sphere is

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 46

The energy stored in a capacitor of capacity

C

and potential

V

is given by

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 47

An electron of mass

m

and charge

e

, is accelerated from rest through a potential difference

V

in vacuum. Its final velocity will be

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 48

When a proton is accelerated through

1 V

, then its kinetic energy will be

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Gamma Question Bank for Medical Physics>Chapter 17 - Electrostatic Potential and Capacitance>Assignment>Q 49

A parallel plate condenser with oil between the plates (dielectric constant of oil

k = 2

) has a capacitance

C .

If the oil is removed, then capacitance of the capacitor becomes