On an insulated rod having length L Q charge is evenly distributed and a point charge q is placed at a distance d from are of its ends as shown. What will be total electric force on q? q A B

A charge Q is distributed over a line of length L Another point charge q is placed at a distance r from the centre of the line distribution. Then the force experienced by q is

A charge Q is distributed over a line of length L Another point charge q is placed at a distance r from the centre of the line distribution.Then the force experienced by q is

Inside a neutral hollow conducting sphere of radius X and centre C, a point charge q is placed as shown in the figure. Another point charge q_1 , is placed outside the sphere at distance d from centre. The net- electrostatic force on charge q placed at the centre is K=1/(4piepsilon_0)

A wire of length L carries charge Q uniformly distributed along its length. Find the electric field at a distance (sqrt(3)L)/2 from the wire at point A as shown.

A solid conducting sphere of radius r is having a charge of Q and point charge q is a distance d from the centre of sphere as shown. The electric potential at the centre of the solid sphere is :

A point charge q is placed at a distance (a)/(2) directly above the centre of a horizontal square of side 'a' and another point charge -q is placed at a distance 'a' directly below one of its (the square's) corners. The electric flux through the square is :

Four point charges Q.q Q and q are placed at the corners of a square side 'a' as shown in the figures. Find the resultant electric force on a charge Q,

A rod of length l having uniformly distributed charge Q is rotated about one end with constant frequency f Its magnetic moment

A cylinder of length L has a charge of magnitude q. The electric intensity at a point at a distance r from the axis of the cylinder is