A hollow charged metal sphere has a radius r . If the potential difference between its surface and a point at a distance 3 r from the centre is V , then the electric field intensity at distance 3 r from the centre is -

Question

A hollow charged metal sphere has a radius r . If the potential difference between its surface and a point at a distance 3 r from the centre is V , then the electric field intensity at distance 3 r from the centre is -, V 3 r, V 4 r, V 6 r, V 2 r

MARKS App · Accepted Answer

V A - V B = k q r - k q 3 r = V k q r × 2 3 = V E B = k q 3 r 2 = 3 2 V r 3 r 2 = 3 V r 2 × 9 × r 2 = V 6 r

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