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Relation between the stopping potential ...

Relation between the stopping potential `V_0` of a metal and the maximum velocity of the photoelectrons is

A

`V_0prop(1)/(v)`

B

`V_0prop(1)/(v^2)`

C

`V_0 propv^2`

D

`V_0=v`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Choose the graph showing the correct relationship between the stopping potential V_0 and the frequency v of light for potassium and tungsten.

    A
    B
    C
    D

  • Assertion: If the maximum kinetic energy of electrons emitted by a photo cell is 5 eV, then the stopping potential is 5 V. Reason: Stopping potential for fastest photoelectrons is numerically equal to their kinetic energy.

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    Assertion is True, Reason is True,
    Reason is a correct explanation for Assertion.
    B
    Assertion is True, Reason is True,
    Reason is not a correct explanation for Assertion.
    C
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    D
    Assertion is False but, Reason is True.

  • When a metal surface is illuminated by light of wavelength 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck's constant c = velocity of light in air)

    A
    `2 hc xx 10^(6) J`
    B
    `1.5 hc xx 10^(6) J`
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