The charge given to a hollow sphere of radius 10 cm is 3.2 x l0-19 coulomb. At a distance of 4 cm from its centre, the electric potential will be

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28.8 x 10-9 volts

288 volts

2.88 volts

zero

answer is A.

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Detailed Solution

Potential is to be determined at a distance of 4 cm from centre of sphere i. e., inside the sphere.V=kqr=9×109×3.2×10-1910×10-2=28.8×10-9 volts

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