What charge placed at 9 cm from a charge of `100 muc` will experience a force of `frac(1)(9)`N in air?

What charge placed 9 cm from a charge of 100 muC will produce a force of 1//9 N in air?

Moving charges in a magnetic field would experience a force.

When does a charged particle moving in a magnetic field experience no force? .

Two particles of equal mass m and charge q are placed at a distance of 16 cm. they do not experience any force. The value of q/m is

Four charges of + 6 x 10^-8 C each are placed at the comers of a square whose sides are 3cm each. Calculate the resultant force on each charge and shows in direction an a diagram drawn to scale.

Two point charges of + 5 mu C are so placed that they experience a force of 8 xx 10^-3 N. They are then moved apart, so that the force is now 2 xx 10^-3 N. The distance between them is now

Two spheres carrying charges +6muC and +9muC , separated by a distance d, experiences a force of repulsion F. when a charge of -3muC is given to both the spheres and kept at the same distance as before, the new force of repulsion is

The charges on two sphere are +7 muC and -5 muC respectively. They experience a force F. If each of them is given an additional charge of -2 mu C , the new force of attraction will be

Three charges, q each, are placed at the vertices of an equilateral triangle. What will be the resultant force on charges Q placed at the centroid of the triangle?

Two point charges of A = + 5.0 mu C and B = -5.0 mu C are separated by 5.0 cm. A point charge C = 1.0 mu C is placed at 3.0 cm away from the centre on the perpendicular bisector of the line joining the two point charges. The charge at C will experience a force directed towards A. point A B. point B C. a direction parallel to line AB D. a direction along the perpendicular bisector