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There are two identical capacitors, the first one is uncharged and filled with a dielectric constant while the other one is charged to potential having air between its plates. If two capacitors are joined end to end, the common potential will be
(a)
(b)
(c)
(d)

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Important Questions on Electrostatic Potential and Capacitance
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If initial charge on all the capacitors were zero, work done by the battery in the circuit shown is

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A capacitor of capacitance is charged with the help of a battery. It is then discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity and mass If the temperature of the block rises by , the value of is

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Which of the following is not true?

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How many capacitors must be connected in parallel to store a charge of with a potential of across the capacitors ?

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A hollow metal sphere of radius is charged such that the potential on its surface becomes . The potential at the centre of the sphere is

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Charge is at the centre of a circular path with radius Work done in carrying charge once around this equipotential path, would be

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An electric dipole of dipole moment is placed in the position of stable equilibrium in uniform electric field of intensity This is rotated through an angle from the initial position. The potential energy of the electric dipole in the final position is

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There is an electric field in direction. If the work done on moving a charge of through a distance of along a line making an angle with axis is then what is the value of ?
