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Work function of a metl surface is 4.2 e...

Work function of a metl surface is 4.2 eV. The maximum wavelength which can eject electrons from this metal surface is:

A

540 nm

B

400 nm

C

310 nm

D

220 nm

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MODERN PUBLICATION-UNIT TEST -07-EXERCISE
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  2. The time taken by a photoelectron to come out after the photon strikes...

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  3. Work function of a metl surface is 4.2 eV. The maximum wavelength whic...

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  4. Sodium and copper have work functions 2.3 eV and 4.5 eV, respectively....

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  5. A photocell is illuminated by a small bright source placed 1 m away .w...

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  6. According to Einstein's photoelectric equation, the graph between kine...

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  7. The surface of a metal is illuminted with the light of 400 nm.the kine...

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  8. The threshold freuency for a metallic surface corresponds to an energy...

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  9. This question has statement - 1 and statement - 2 of the four choice g...

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  10. Two identical photocathodes receive the light of frequencies f1 and f2...

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  11. The anode vollage of a photocell is kept fixed . The wavelength lambda...

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  12. The de-Broglie wavelength of a tennis ball of mass 60 g moving wiht a ...

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  13. If the kinetic energy of a free electron doubles,its de-Broglie wavele...

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  14. A radiation of energy E falls normally on a perfecly reflecting surfac...

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  15. Direction:Answer the MCQ no.15 to 17 on the basis of the folowing para...

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  16. Wave property of electron implies that they will show diffraction effe...

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  17. Wave property of electron implies that they will show diffraction effe...

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  18. Wavelength of the radiation of freuquency 100 Hz is :

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  19. Planck's constant has the dimetnsion of

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  20. The value of Planck's constant is

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