The work done in carrying a charge q once round a circle of radius r with a charge Q at the centre is

The work done in carrying a charge Q_(1) once round a circle of radius R with a charge Q_(2) at the centre is

A unit positive charge is moved along the circumfer-ence of a circle of radius, r with a -5muC charge at the centre at the centre of the circle. Then, the work done in the process is "______" .

If a charge q is moving in a circle of radius r with speed v, then the equivalent current will be :

Refer to the arrangement of charges in Fig and a Gaussian surface of radius R with Q at the centre. Then

On ortating a point charge having a charge q around a chrage Q in a circla of radius r . The work done will be

Three equal point charges of charge +q each are moving along a circle of radius R and a point charge -2q is also placed at the centre of circle (as shown in figure). If charge are revolving with constant and same speed in the circle then calculate speed of charges