The diagrams below show regions of equipotential. A positive charge is moved from A to B in each diagram.

In all the four cases the work done is the same.

Maximum work is required to move q in figure (c).

Minimum work is required to move q in figure (a).

Maximum work is required to move q in figure (b).

EASY

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Half of the non-conducting ring has $(+ Q)$ charge and half has $(- Q)$ charge. Find potential at point $A$ which is on the line passing through centre perpendicular to plane of ring.

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Important Questions on Electrostatics

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There is a uniform electrostatic field in a region. The potential at various points on a small sphere centred at

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and

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x = 0

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third charge

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An electric field

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y = 2 m

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Physics>Electricity and Magnetism>Electrostatics>Electric Potential and Potential Energy

The diagrams below show regions of equipotential.

Question Image

A positive charge is moved from $A$ to $B$ in each diagram.

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Physics>Electricity and Magnetism>Electrostatics>Electric Potential and Potential Energy

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A point particle of mass $0.5 kg$ is moving along the $X$ -axis under a force described by the potential energy $V$ shown below. It is projected towards the right from the origin with a speed $v$ .

Question Image

What is the minimum value of $v$ for which the particle will escape infinitely far away from the origin?

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The electric potential at a point

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Physics>Electricity and Magnetism>Electrostatics>Electric Potential and Potential Energy

A solid conducting sphere, having a charge

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V .

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r < a,

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When an

α

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m

moving with a undefined velocity bombards on a heavy nucleus of charge

Ze

, its distance of the closest approach from the nucleus depends on

m

as:

Half of the non-conducting ring has +Q charge and half has -Q charge. Find potential at point A which is on the line passing through centre perpendicular to plane of ring.

Important Questions on Electrostatics

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Half of the non-conducting ring has $(+ Q)$ charge and half has $(- Q)$ charge. Find potential at point $A$ which is on the line passing through centre perpendicular to plane of ring.