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The figure represents a square carrying charges +q, +q, –q and –q at its four corners as shown. Then the potential will be zero at points (A, C, P and Q are midpoints of sides)

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Important Questions on Electrostatics

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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 84

Two equal positive charges are kept at points A and B. The electric potential, while moving from A to B along the straight line

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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 85
Semicircular ring of radius 0.5 m is uniformly charged with a total charge of 1.5 × 10–9 C. The electric potential at the centre of this ring is:
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 86
When a charge of 3 C is placed in a uniform electric field, it experiences a force of 3000 N. The potential difference between two points separated by the distance of 1 cm along the field is:
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 87
A 5 coulomb charge experiences a constant force of 2000 N when moved between two points separated by a distance of 2 cm in a uniform electric field. The potential difference between these two points is:
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 88

The potential difference between points A and B in the given uniform electric field is:

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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 89
An equipotential surface and an electric line of force:
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 90
If a uniformly charged spherical shell of radius 10 cm has a potential V at a point distant 5 cm from its centre, then the potential at a point distant 15 cm from the centre will be:
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Alpha Question Bank for Engineering: Physics>Chapter 22 - Electrostatics>Exercise - 1>Q 91
A hollow uniformly charged sphere has radius r. If the potential difference between its surface and a point at distance 3r from the centre is V, then the electric field intensity at a distance 3r from the centre is: