Question

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

Answer 1

Answer:

Let the two charges +q1 and +q2 be placed at a distance 2r from each other and the charge +Q be placed at a distance r from each of the two equal charges. For the system to be in equilibrium, {Just in case you are new to the term, equilibrium is a state in which opposing forces are balanced.

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