Three positive charges and five negative charges of same magnitude are arrangement as shown in the figure. The magnitude of the electric field and the electric potential at the centre of the circle of radius r are given by

Engineering

Physics

Electric Potential Energy and Electric Potential

Question

$E = \frac{2 kq}{r^{2}} (1 + 2 \sqrt{2}), V = 0$

$E = \frac{2 kq}{r^{2}} (1 + 2 \sqrt{2}), V = \frac{- 2 qk}{r}$

None of these

$E = \frac{2 kq}{r^{2}} (1 + \sqrt{2}), V = \frac{- 2 qk}{r}$

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$E = \frac{kq}{R^{2}} \cos 45 º \times 4 + \frac{kq}{r^{2}} \times 2$

$= \frac{kq}{r^{2}} [2 + 2 \sqrt{2}]$

$v = \frac{- 2 kq}{r}$