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Electric field in a region is uniform and is given by E=ai^+bj^+ck^. Electric flux associated with a surface of area A=πR2i^ is

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Important Questions on Electric Charges and Fields

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An infinite line charge is at the axis of a cylinder of length 1 m and radius 7 cm. If electric field at any point on the curved surface of cylinder is 250 N C-1, then, net electric flux through the cylinder is
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A small conducting sphere is hanged by an insulating thread between the plates of a parallel plate capacitor as shown in figure. The net force on the sphere is

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A charge is situated at a certain distance from an electric dipole in the end-on position experiences a force F. If the distance of the charge is doubled, the force acting on the charge will be,
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A charge q is placed at the centre of the open end of a cylindrical vessel. The flux of the electric field through the surface of the vessel is,
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An electric dipole when placed in a uniform electric field E will have minimum potential energy, when the angle made by dipole moment with field E is
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An electric dipole is placed in non-uniform electric field. It may experience
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The given figure shows, two parallel plates A and B of charge densities +σ and -σ respectively. Electric intensity will be zero in region

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A sphere of radius R has a uniform distribution of electric charge in its volume. At a distance x from its centre for x<R, the electric field is directly proportional to