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qUESTIONS

A wire is bent in a circle of radius 10 cm. It is given a charge of 250μC which spreads on it uniformly. What is the electric potential at the centre ?

If 120 J of work is done in carrying a charge of 6 C from a place where the potential is 10 volt to another place where the potential is V, find V

Potential at a point A in space is given as 4 × 105 V. (i) Find the work done in bringing a charge of 3 µC from infinity to the point A. (ii) Does the answer depend on the path along which the charge is brought ?

The charge per unit area of a large flat sheet of charge is 3μC/m2. Calculate the electric field intensity at a point just near the surface of the sheet, measured from its midpoint.

The length of a straight thin wire is 2 m. It is uniformly charged with a positive charge of 3μC. Calculate: (i) the charge density of the wire (ii) the electric intensity due to the wire at a point 1.5 m away from the center of the wire

A sphere of radius 10 cm carries a charge of1µC. Calculate the electric field (i) at a distance of 30 cm from the center of the sphere (ii) at the surface of the sphere and (iii) at a distance of 5 cm from the center of the sphere.

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