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A silver of radius 4.8 cm is suspended b...

A silver of radius `4.8 cm` is suspended by a thread in the vacuum chamber . `UV` light of wavelength `200 nm` is incident on the ball for some times during which a total energy of `1 xx 10^(-7) J` falls on the surface . Assuming on an average one out of `103` photons incident is able to eject electron. The potential on sphere will be

A

1 V

B

2 V

C

3 V

D

zero

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The correct Answer is:
C
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