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Questions  

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0×1013cm is

a
80 volts
b
8×106 volts
c
9 volts
d
9×105 volts

detailed solution

Correct option is B

V=9×109×50×1.6×10−199×10−15=8×106V

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