Questions
Four point +ve charges of same magnitude (Q) are placed at four corners of a rigid square frame as shown in figure. The plane of the frame is perpendicular to z - axis. If a –ve point charge is placed at a distance z away from the above frame (z<<L) then
detailed solution
Correct option is A
The negative charge oscillates, the resultant force acts as a restoring force and proportional to displacement. When it reaches the plane XY, the resultant force is zero and the mass moves down due to inertia. Thus oscillation is set.Similar Questions
Two point charges +8q and -2q are located at x = 0 and x = L respectively. The location of a point on the x-axis at which the net electric field due to these two point charges is zero is
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