A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to:

If a charge q is placed at the centre of the line joining two equal charges Q such that the system is in equilibrium then the value of q is

A point charge q is placed at the centre of a line joining two equal charges Q. The whole system is in the state of equilibrium. Can you impose some lower limit on the magnitude of the charge Q?

A charge "q" is placed at the centroid of an equilateral triangle. Three charges having same "],[" charge equal to "Q" are placed at the vertices of the triangle.The system of four charges will be in equilibrium if "q" is equal to

A charge q is placed in the middle of a line joining the two equal and like point charge Q .This charge q will remain in equilibrium if q=(Q)/(x) .What is x ?

A charge Q is placed at the centre of the line joining two point charges +q and +q as shown in figure. The ratio of charges Q and q is

Two equal charges, +Q each, are at a distance r from each other. A third charge is placed on the line joining the above two charges such that all these charges are in equilibrium. Find q, in terms of Q.

Two point charges q_(1) = +2 C and q_(2) = - 1C are separated by a distance d . The position on the line joining the two charges where a third charge q = + 1 C will be in equilibrium is at a distance

Two idential point charges Q are kept at a distance r from each other. A third point charge is placed on the line joing the above two charges such that all the three charges are in equilibrium. The third charge (a) should be of magnitude q=……….. (b) should be of sign ....... (c ) should be placed ........ .