Charges `+q` and `-q` are placed at points `A` and `B` respectively which are a distance `2L` apart, `C` is the midpoint between `A` and `B`. The work done in moving a charge `+Q` along the semicircle `CRD` is

Two point charges +q and -q are placed at point A and B respectively which are at a distance 2m apart. C is the midpoint between A and B. The work done by external agent in moving a charge Q slowly along the triangular path CED (AC=BC=BD)

A charge +q is placed at the origin O of X- Y axes as shown in the figure . The work done in taking a charge Q from A to B along the straight line AB is

Two charges +q and -q are located at points A(0,0. -2) and B(0,0,2) respectively. How much work will be done in moving a test charge from point P (4,0,0) and Q(-5,0,0) ?

A sphere is constructed around a positive point charge q. The work done in moving a unit positive charge on this sphere is numerically equal to

Two similar charge of +Q , as shown in figure are placed at A and B. –q charge is placed at point C midway between A and B. –q charge will oscillate if

A charge q moves by a distance 'dl' under the presence of magnetic field B. Find work done by field

Two point charges Q and q are placed at distance r and r/2 respectively alogn a straigt line from a third charge 4q. If q is in equilibrium determine Q/q .