A charge Q is placed at each of the opposite corners of a square.

Question:

A charge $Q$ is placed at each of the opposite corners of a square. A charge $q$ is placed at each of the other two corners. If the net electrical force on $Q$ is zero, then $\frac{Q}{q}$ equals :-

  1. 1

  2. $-\frac{1}{\sqrt{2}}$

  3. $-2 \sqrt{2}$

  4. - 1


Correct Option: , 3

Solution:

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