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When monochromatic radiation of intensit...

When monochromatic radiation of intensity I falls on a metal surface, the number of photoelectrons and their maximum kinetic are N and T respectively. If the intensity of radiation is 2 I, the number of emitted electrons and their maximum kinetic energy are respectively.

A

N and 27

B

2N and T

C

2N and 27

D

N and T

Text Solution

Verified by Experts

The correct Answer is:
B
The number of photoelectrons ejected is directly proportional to the intensity of incident  light. Maximum kinetic energy is independent of intensity of incident light but depends upon the frequency of light. Hence, option (b) is correct.
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Knowledge Check

  • Monochromatic radiation of intensity I falls on a metal surface and the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2I, what is the number of emitted electrons and their maximum kinetic energy respectively?

    A
    N and 2T
    B
    2N and T
    C
    2N and 2T
    D
    N and T

  • When a given electromagnetic radiation illuminates the metal surface , the maximum kinetic energy of photoelectrons depends on

    A
    frequency of radiation
    B
    intensity of radiation
    C
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    D
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  • When photons of energy hv fall on a metal plate of work function ' W_(0) ' , photoelectrons of maximum kinetic energy 'K' are ejected. If the frequency of the radiation is doubted, the maximum kinetic energy of the ejected photoelectrons will be

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    D
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