Electrostatics

Question: 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

1) $- \frac{Q}{2}$

2) $- \frac{Q}{4}$

3) $+ \frac{Q}{4}$

4) $+ \frac{Q}{2}$

Solution:

Explanation: Explanation

electric-field-potential

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