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qUESTIONS

Four electric charges +q, +q, -q and -q are placed in order at the corners of a square of side ‘2r’. The electric potential at the centre of square is

In parallel plate capacitor, electric field between the plates is ‘E’. If the charge in the plates is ‘Q’ then the force on each plate is

A series combination of N₁ capacitors (each of capacity C₁) is charged to potential difference ‘3V’. Another parallel combination of N₂ capacitors (each of capacity C₂) is charged to potential difference ‘V’. The total energy stored in both the combinations is same. The value of C1 in terms C₂ is

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