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Figure below shows regular hexagon, with different charges placed at the vertices. In which of the following cases is the electric field at the centre zero?
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Important Questions on Electrostatics
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Electric field at the centre '' of a semicircle of radius '' having linear charge density , is given as:
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For the given figure the direction of electric field at A will be:
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charge is on a drop of water having a mass . What electric field should be applied on the drop so that it is in the balanced condition with its weight?
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Two small identical spheres, each of mass and carrying the same charge are suspended by threads of equal lengths. If the distance between the centres of the spheres is in equilibrium then the inclination of the thread with the vertical will be:
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Two infinitely long parallel wires having linear charge densities , and respectively are placed at a distance metre. The force per length on either wire will be
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A solid sphere of radius , is charged uniformly with a total charge . Then the correct expression for electric field is (distance from centre):
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A sphere of radius and charge is placed inside a concentric imaginary sphere of radius . The flux associated with the imaginary sphere is:
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A nonconducting solid sphere of radius is charged uniformly. The magnitude of the electric field due to the sphere at a distance from its centre :
(a) increases as increases, for
(b) decreases as increases, for
(c) decreases as increases, for
(d) is discontinuous at
