# If 4 point charges each +c is placed on the circumference of a circle of the diameter 2S if such a way that position of these 4 charges form a square on the circumference of the circle. Then, what is the potential at the center of the circle? Option 1) 4c / S Option 2) 0 Option 3) 3c/S Option 4) S / 4c

Answers (1)
A Aadil Khan

As we learnt in

Potential of a System of Charge -

$\dpi{100} V=\frac{kq_{1}}{r_{1}}+k\frac{q_{2}}{r_{2}}+\frac{k\left ( -q_{3} \right )}{r_{3}}+\cdots$

- wherein

Potential at centre, $V= 4.\left ( \frac{KC}{S} \right )$

Option 1)

4c / S

Correct

Option 2)

0

Incorrect

Option 3)

3c/S

Incorrect

Option 4)

S / 4c

Incorrect

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