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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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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 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 30
Two long thin charged rods with charge density λ each are placed parallel to each other at a distance d apart. The force per unit length exerted on one rod by the other will be where k=14πε0
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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
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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 32
Gauss's law can help in easy calculation of electric field due to