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Q.

What is the electric potential at the centre of the square?

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a

zero

b

$kq / a \sqrt{2}$

c

$kq / a^{2}$

d

none of these

answer is A.

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Detailed Solution

Question Image

Electric potential at centre

$V = + \frac{k Q}{\frac{a}{\sqrt{2}}} - \frac{k Q}{\frac{a}{\sqrt{2}}} + \frac{k Q}{\frac{a}{\sqrt{2}}} - \frac{k Q}{\frac{a}{\sqrt{2}}} = 0$

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