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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

2V

C

3V

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Light of wavelength 5000 Å and intensity of 3.96 xx 10^(-3) watt//cm^(2) is incident on the surface of photo metal . If 1% of the incident photons only emit photo electrons , then the number of electrons emitted per unit area per second from the surface will be

    A
    `9.82 xx 10^(17) m^(-2)//2`
    B
    `9.82 xx 10^(13) m^(-2) // s`
    C
    `9.82 m^(-2)//s`
    D
    `none of these