Electrostatics ...

If 10¹⁰ electrons are acquired by a body every second, the time required for the body to get a total charge of1 C will be

Four point charges –Q, –q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q for which the potential at the centre of thesquare is Zero is

A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium, if q is equal to

Two small spheres each carrying a charge q are placed r metre apart. If one of the sphere is taken around the other one in a circular path of radius r, the work donewill be equal to

Two charged spheres of radii 10 cm and 15 cm are connected by a thin wire. No charge will flow, if they have

Theelectric potential V at any point O(x,y, z all in metres) in space is given by V = 4x² volt. The electric field at the point(1m, 0, 2m) in volt / metre is

A hollow metal sphere of radius 5 cm is charged so that the potential on its surface is 10V. The potential at the centre of the sphere is

If a unit positive charge is taken from one point to another over an equipotential surface, then

Electric lines of force about negative point charge are

A uniform electric field having a magnitude E, and direction along the positive X-axis exists. If the potential V is zero at x = 0, then its value at X = +x will be