Point charges of `+6 mu C` and `-4 mu C` are placed x - axis at `x=8m` and `x=16m` respectively. What magnitude of charge (in `mu` C ) must be placed at `x=-8m`,so that any charge kept at origin experiences no electrostatic force?

Two point charges of, 1 mu C and -1 mu C are kept at (-2 m, 0) and (2 m, 0) respectively. Calculate the electric field at point (0, 5 m).

Point charge q_(1) = 2 mu C and q_(2) = - 1mu C are kept at points x = 0 and x = 6 respectively. Electrical potential will be zero at points

Two charges +5mu C and +10 mu C are placed 20 cm apart. The net electric field at the mid-point between the two charges is

An infinite number of charges, each of magnitude q, are placed along x-axis at x = 1m, 2m, 4m, 8m, 16m and so on but the consecutive charges are of opposite sign starting with +q at x = 1m. A point charge q_0 , kept at the origin, experiences a force of magnitude :

Two point charges of magnitude 4 mu C and-4 mu C are kept at points (-2 cm, 0) and (2 cm, 0) respectively. Calculate the magnitude of electric field intensity at points (0, 2 cm).

Two point charges of +1.5 mu C " and " -1.5 mu C are placed at the corners A and B of an -6 mu C placed at the third corner of the triangle ?

Point charges q_(1) =4 mu C and q_(2) = -2 mu C are kept at point x = 0 and x = 4 respectively , electrical potential will be zero at points (where x is in cm)

Two charges 1 mu C and 1 mu C are placed at a distance of 10cm .The position of third charge between them so that it does not experience any force

Electric charges of 1mu C, -1 mu C and 2mu C are placed in air at the corners A,B and C respectively of an equilateral triangle ABC having length of each side 10 cm . The resultant force on the charge at C is

Two Charges 5 mu C and 20 mu C are placed on two concentric circes of radius 10 cm and 20 cm respectively lying in x-y plane . The potential at centre is