Electrostatics

Question: Equal charges \[q\] are placed at the four corners \[A,\,B,\,C,\,D\] of a square of length \[a\]. The magnitude of the force on the charge at B will be

1) \[\frac{{3{q^2}}}{{4\pi {\varepsilon _0}{a^2}}}\]

2) \[\frac{{4{q^2}}}{{4\pi {\varepsilon _0}{a^2}}}\]

3) \[\left( {\frac{{1 + 2\sqrt 2 }}{2}} \right)\frac{{{q^2}}}{{4\pi {\varepsilon _0}{a^2}}}\]

4) \[\left( {2 + \frac{1}{{\sqrt 2 }}} \right)\frac{{{q^2}}}{{4\pi {\varepsilon _0}{a^2}}}\]

Solution:

Explanation: 3e

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