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Earn 100
Three charges and are placed as shown in the figure. The -component of the force on is proportional to:
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Important Questions on Electrostatics
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An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius . The Coulomb force on the electron is :
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A charge is placed in the middle of two equal and like point charges . For this system to remain in equilibrium the value of is
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Two positive charges each of equal magnitude are placed at a separation perpendicular to -axis. Another negative charge of mass , is placed midway between the two charges on -axis. If this charge is displaced from equilibrium state to a distance , then the particle:
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Two equal negative charges are placed at points and on y-axis. A positive charge at rest is left to move from point . This charge will,
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A thin glass rod is bent into a semicircle of radius . A charge is uniformly distributed along the upper half and a charge is uniformly distributed along the lower half, as shown in the figure .The magnitude and direction of the electric field produced at , the centre of the circle, will be:
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A metallic shell has a point charge '' kept inside its cavity. Which one of the following diagrams correctly represents the electric lines & forces?
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A circular wire loop of radius '' carries a total charge '' distributed uniformly over its length. A small length dl of the wire is cut off. The electric field at the centre due to the remaining wire:
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Two concentric conducting thin spherical shells , and having radii and are charged with charges and - . The electric field along a line, (passing through the centre) varies with distance from the centre as:
