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When stopping potential is applied in an...

When stopping potential is applied in an experiment of photoelectric effect, no photocurrent is observed. This means that

A

The emission of photo electrons is stopped

B

The photoelectrons are emitted but are reabsorbed by the emitter

C

The photoelectrons are accumulated near the collector

D

The photoelectrons are dispersed from the sides of the apparatus

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • A non mono chromatic light is used in an experiment on photo electric effect. The stopping potential is related to the

    A
    Mean wave length
    B
    Longest wave length
    C
    Shortest wave length
    D
    Distance of the source from the metal

  • The collector plate in an experiment on photo electric effect is kept vertically above the emitter plate. Light source is put on and a saturation photo current is recorded. Parallel electric and magnetic fields are applied vertically downwards between the plates. Then

    A
    The photo current will increase
    B
    The K.E. of the photo electron will decrease
    C
    The stopping potential will increase
    D
    The threshold wave length increases

  • Electrons ejected from the surface oa a metal ,when light of certain frequency is incident on it ,are stoppeed fully by a retarding potenital of 3V. Photoelectric effect in this metallic surface begins at a frequency 6xx10^(14)s^(-1) .The frequency of the incident light in s^(-1) is [Planck's constant =6.4xx10^(-34) Js, charge on the electron =1.6xx10^(-19)C]

    A
    `7.5xx10^(13)`
    B
    `13.5xx10^(13)`
    C
    `13.5xx10^(14)`
    D
    `7.5xx10^(13)`

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