Electrostatics

Related Questions

• A pendulum bob of mass $30.7 \times {10^{ - 6}}\,kg$ and carrying a charge $2 \times {10^{ - 8}}\,C$ is at rest in a horizontal uniform electric field of 20000 V/m. The tension in the thread of the pendulum is $(g = 9.8\,m/{s^2})$

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• Two thin wire rings each having a radius R are placed at a distance d apart with their axes coinciding. The charges on the two rings are $+ q$ and $- q$. The potential difference between the centres of the two rings is

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• Electric potential of earth is taken to be zero because earth is a good

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• If 3 charges are placed at the vertices of equilateral triangle of charge ‘q’ each. What is the net potential energy, if the side of equilateral $\Delta $ is l cm

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• A hollow metallic sphere of radius R is given a charge Q. Then the potential at the centre is

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