[" 7.Two thin wire rings each having a radius "R" are placed at a "],[" distance "d" apart with their axes coinciding.The charges on "],[" the two rings are "+q" and "-q." The potential difference "],[" between the centres of the two rings is "]

Two thin wire rings each having radius R are placed at distance d apart with their axes coinciding. The charges on the two are +Q and -Q . The potential difference between the centre so the two rings is

Two thin wire rings each having radius R are placed at distance d apart with their axes coinciding. The charges on the two are +Q and -Q . The potential difference between the centre so the two rings is

Two thin rings each of radius R are placed at a distance 'd' apart. The charges on the rings are +q and -q. The potential difference between their centres will be -

Two identical thin rings, each of the radius R are coaxially placed at a distance R from each other. If Q_(1) and Q_(2) are the charges uniformly distributed on the rings, then calculate the work done in moving a charge q from the centre of one ring to the centre of the other.

Charge q is uniformly distributed over a thin half ring of radius R . The electric field at the centre of the ring is

Charges q is uniformly distributed over a thin half ring of radius R . The electric field at the centre of the ring is