Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 20

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An electric dipole consists of two opposite charges, each of magnitude $1.0 μC$ separated by a distance of $2.0 cm$ . The dipole is placed in an external electric field of $10^{5} N C^{- 1}$ . The maximum torque on the dipole is

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Important Questions on Electric Charges and Fields

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 21

A charge

q

is placed at the centre of the open end of a cylindrical vessel. The flux of the electric field through the surface of the vessel is,

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 24

An electric dipole when placed in a uniform electric field

E

will have minimum potential energy, when the angle made by dipole moment with field

E

is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 25

An electric dipole is placed in non-uniform electric field. It may experience

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 26

The given figure shows, two parallel plates $A$ and $B$ of charge densities $+ σ$ and $- σ$ respectively. Electric intensity will be zero in region

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 27

A sphere of radius

R

has a uniform distribution of electric charge in its volume. At a distance

x

from its centre for

x < R

, the electric field is directly proportional to

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 28

The electric field at

20 cm

from the centre of a uniformly charged non-conducting sphere of radius

10 cm

is

E

. Then at a distance

5 cm

from the centre it will be

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 29

If a small sphere of mass

m

and charge

q

is hung from a silk thread at an angle

θ

with the surface of a vertical charged conducting plate, then for equilibrium of sphere, the surface charge density of the plate is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 31

Two isolated metallic spheres of radii

2 cm

and

4 cm

are given equal charge, then the ratio of charge density on the surfaces of the spheres will be