`n` charges `Q,4Q,9Q,16Q….` are placed at distance of `1,2,3…..` metre form a point `0,`on the same straight line .The electric intensity at `0` is

Two point charges 4Q and Q are separated by a distance of 1 m in air. At what point on the line joining the two charges is the electric field intensity zero?

Consider a point charge +q placed at the origin and another point charge -2p placed at a distance of 9 m from the charge +q . Determine the point between the two charges at which electric potential is zero.

Three point charges -Q, Q and Q are placed on a straight line with distance d between charges as shown. Find the magnitude of the electric field at the point P in the configuration shown which is at a distance a from middle charge Q in the system provided that a gt gt d . Take 2Qd=p .

Three point charges -Q, Q and Q are placed on a straight line with distance d between charges as shown. Find the magnitude of the electric field at the point P in the configuration shown which is at a distance a from middle charge Q in the system provided that a gt gt d . Take 2Qd=p .

Two point charges +q and -q are placed at points A and B respectively separated by a samll distance. The electric field intensity at the midpoint O of AB :

Three charges -q, +Qand -q are placed at equal distance on straight line If the potential energy of the system of the three charges is zero, then what is the ratio of Q : q ?

Three point charges q, 2q and 3q are placed at the vertices of an equilateral triangle of side ‘a’. Find the electric potential and intensities at the geometric centre of the triangle.

The point charges Q and -2Q are placed at some distance apart. If the electirc field at the location of Q is E , the electric field at the location of -2Q will be