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The surface of a metal illuminated with ...

The surface of a metal illuminated with the light of `400 nm`. The kinetic energy of the ejected photoelectrons was found to be `1.68 eV`. The work function of the metal is : `(hc=1240 eV.nm)`

A

3.09 eV

B

1.42eV

C

151eV

D

1.68 eV

Text Solution

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The correct Answer is:
B
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MOTION-MODERN PHYSICS -1-EXERCISE-4(LEVEL-I)
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  6. Statement - 1 : When ultraviolet light is incident on a photocell , it...

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  7. Statement I A metallic surface is irradiated by a monochromatic light ...

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  9. After absorbing a slowly moving neutrons of mass m(N) (momentum ~0) a...

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  10. Statement-1: Davisson-Germer experiment established the wave nature of...

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  11. Hydrogen atom is excieted from ground state to another state with prin...

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  12. A diatomic molecule is made of two masses m(1) and m(2) which are sepa...

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  13. The anode voltage of photocellis kept fixed. The wavelength lambda of ...

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  14. In a hydrogen like atom electron make transition from an energy level ...

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  15. Hydrogen (.(1)H^(1)), Deuterum (.(1)H^(2)), singly ionised Hellium (....

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  16. The radiation corresponding to 3 rarr 2 transition of hydrogen atom f...

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  17. As an electron makes a transition from an excited state to the ground ...

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  18. Radiation of wavelength lamda is incident on a photocell. The fastest ...

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  20. A particle A of mass m and initial velocity v collides with a particle...

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