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qUESTIONS

What is not true for equipotential surface for uniform electric field

Two point charges 100μC and 5μC are placed at points A and B respectively with AB=40 cm.The workdone by external force in displacing the charge 5μC from B to C is.. Here BC=30 cm, ∠ABC=π/2 and 1/4πε0=9 x 10^9 Nm^2/C^2

Four electric charges +q, +q, -q and -q are placed at the corners of a square of side 2L (see figure). The electric potential at point A, midway between the two charges +q

The area of the plates of a parallel plate condenser is A and the distance between the plates is 10mm. There are two dielectric sheets, one of dielectric constant 10 and thickness 6mm and the other of dielectric constant 5 and thickness 4mm. The capacity of the condenser is

Two condensers of capacities ‘C’ and ‘2C’ are connected in parallel and then in series with third condenser of capacity ‘3C’. The combination is charged to ‘V’ volt. The charge on the condenser of capacity ‘C’ is

The capacitance of a capacitor becomes 7/6 times its original value, if a dielectric slab of thickness t = 2d/3 is introduced between the plates, where ‘d’ is distance of separation between the plates. The dielectric constant of the slab is

If the charge on the capacitor is increased by 2.coulomb, the energy stored in it increases by 21%. The original charge on the capacitor is

A variable condenser is permanently connected to a battery of 100V. If the capacity is changed from 2µF to 10µF then change in energy is equal to

The capacity of a condenser in which a dielectric of dielectric constant 5 has been used, is C. If the dielectric is replaced by another with dielectric constant 20, the capacity will become

A 10pF capacitor is connected to a 50 V battery. How much electrostatic energy is stored in the capacitor

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