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Q.

If radius of a hollow metallic sphere is ‘R’. If the P.D between it’s surface and a point at a distance 3R from it’s centre is V then the electric field intensity at a distance 3R from it’s centre is 

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a

V2R

b

V4R

c

V3R

d

V6R

answer is D.

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Detailed Solution

V=14π∈0qR−q3R and E=14π∈0q9R2

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