Three charge `q , Q` and `-4q` are placed in a straight line , line of length `L`at points distant `0 ,L//2` and `L` respectively from one end. In order to make the net force on `q` zero, the charge `Q` must be equal to

Three charges +4q . Q and +q are placed along a straight line of length 'a' at points 0, ( a)/(2) and a respectively . Find the relation between Q and q in order to make the net force on q to be zero For the net force q to be zero.

Three charges 4q, Q and q are in a straight line in the position of 0. l//2 and l respectively. The resultant force on q will be zero, if Q=

Three charges 4q , Q and q are in a straight line in the position 0, l/2 and l respectively. The resultant force on q will be zero if Q is equal to

Three charges -q,+Q and -q are placed in a straight line as shown If the total potential energy of the system is zero, then the ratio (q)/(Q) is

A point charge Q is placed at the midpoint of a linejoining two charges, 4q and q if the net force on charge q is zero, the Q must be equal to :

Three charges -q, Q and -q are placed at equal distances on a straight line. If the total potential energy of the system is zero, then what is the ratio q/Q ?

Three charges -q, Q and -q are placed at equal distances on a striaght line. If the potential energy of the system of three charges is zero, then what is the ratio of Q:q?