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Define work function of a metal.

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If the work function of a metal is 'phi' and the frequency of the incident light is 'v' , there is no emission of photoelectron if

Two photons of energies twice and thrice the work function of a metal are incident on the metal surface .Then, the ratio of maximum velocities of the photoelectrons emitted in the two cases respectively ,is

Photoelectric work- function of a metal is 1 eV. Light of wavelength lambda = 3000 Å falls on it. The photoelectrons come out with maximum velocity

The work function of a metal is 3.4 eV. If the frequency of incident radiation is increased to twice, then the work function of the metal becomes.

If the threshold wavelength for a certain metal is 2000Å , then the work function of the metal is

Name the unit in which the work function of a metal is expressed.

The work function of a metal is 4.2 eV , its threshold wavelength will be

The work function of a metal is 4.2 eV . If radiation of 2000 Å fall on the metal then the kinetic energy of the fastest photoelectron is

The work function of a metal is hv_0 . Light of frequency v falls on this metal. The photoelectric effect will take place only if

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ICSE MODEL PAPER-SAMPLE PAPER 2022-SECTION II
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  14. A mass m1 of a substance of specific heat capacity c1 at temperature t...

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  15. Draw a labelled diagram of an alternating current generator. Write th...

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  16. Define work function of a metal.

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  17. State two factors upon which the rate of emission of thermions depends...

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  18. Define radioactivity. Name various radioactive elements.

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