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You are given an arrangement of three-point charges q, 2q and xq separated by equal finite distances so that the electric potential energy of the system is zero. Then the value of x is

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Important Questions on Electrostatics

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 119
If a charge q is placed at the centre of the line joining two equal charges Q such that the system is in equilibrium, then the value of q is, 
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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 120
If 'n' identical water drops assumed spherical each charged to potential energy U coalesce to a single drop, the potential energy of the single drop is (Assume that drops are uniformly charged):
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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 121
Four charges equal to -Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium, the value of q is
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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 122

A family of equipotential surfaces are shown. The direction of the electric field at point A is along -

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 123

Some equipotential surfaces are shown in the figure. The magnitude and direction of the electric field is-

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 124

The variation of potential with distance r from a fixed point is shown in the figure. The electric field at r=5 cm, is:

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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 125
The electric field and the electric potential at a point are E and V, respectively.
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Alpha Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise-1>Q 126
The electric field in a region is directed outward and proportional to the distance r from the origin. Taking the electric potential at the origin to be zero, the electric potential at a distance r.