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Four charges are placed at the circumference of the dial of a clock as shown in the figure. If the clock has an only hour hand, then the resultant force on a positive charge placed at the centre points in the direction which shows the time as:
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Important Questions on Electrostatics
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Two small spheres each having a charge are suspended by insulating threads of length from a hook. This arrangement is taken to a space where there is no gravitational effect, then the angle between the two threads and the tension in each will be:-
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Identify the wrong statement in the following: Coulomb's law correctly describes the electric force that-
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Two charges and are placed at a separation . The distance of the point where the electric field intensity will be zero is:
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A ring of radius is charged uniformly with a charge . The electric field at a point on its axis at a distance from any point on the ring will be:
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Two positive charges of and are placed apart. The value of the electric field in at the mid-point of the two charges will be:
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The electric field in a certain region is given by . The dimensions of are
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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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Electric field at the centre '' of a semicircle of radius '' having linear charge density , is given as:
