Electrostatics ...

Two point charges +q and –q are held fixed at (–d, o) and (d, o) respectively of a x-y coordinate system. Then

A hollow–sphere of charge does not produce an electric field at any

Six charges of equal magnitude, 3 positive and 3 negative are to be placed on PQRSTU corners of a regular hexagon, such that field at the centre is double that of what it would have been if only one +ve charge is placed at R. Which of the following arrangement of charge is possible for P, Q, R, S, T and U respectively.

A Gaussian surface in the figure is shown by dotted line. The electric field on the surface will be

An object A has a charge of –2μC and the object B has a charge of +6 μC. Which statement is true?

Two equal negative charges –q are fixed at points (0, – a) and (0, a) on y – axis. A positive charge Q is released from rest at the point (2a, 0) on the x - axis. The charge Q will

Two equal charges are separated by a distance d. A third charge placed on a perpendicular bisector at x distance from centre will experience maximum coulomb force, when

Two identical charges repel each other with a force equal to 10 mg–wt, when they are 0.6 m apart in air (take, g =10 ms ^-2 ). The value of each charge is

A charge Q is divided in two parts q and Q – q. What is value of q for maximum force between them?

A pendulum bob carries a negative charge – q. A positive charge +q is held at the point of support. Then, the time period of the bob is