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Work function of ……is the lowest....

Work function of ……is the lowest.

A

caesium

B

platinum

C

nickel

D

copper

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The correct Answer is:
C
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KUMAR PRAKASHAN-ELECTROMAGNETIC WAVES-BOARD.S QUESTION PAPER MARCH - 2020 (PART - A)
  1. Assume that light of wavelength 6000Å is coming from a star. What is t...

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  2. Unpolarised light is incident on a plane glass surface. What would be ...

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  3. Work function of ……is the lowest.

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  4. By applying electric field of the order of………..Vm^-1 to a metal, elect...

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  5. Value of stopping potential depends on……. Of incident light.

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  6. Monochromatic light of frequency 6 times 10^14 Hz is produced by laser...

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  7. is found experimentally that 13.6 eV energy is required to separate a ...

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  8. To excite the hydrogen atom from its ground state to second excited st...

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  9. What is the shortest wavelength present in the Paschen series of spect...

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  10. In case of head on collision, when the impact parameter is minimum the...

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  11. Chlorine has two isotopes having masses 34.98u and 36.98u. The relativ...

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  12. The binding energy per nucleon is almost constant for the nuclei havin...

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  13. Tritium has half life of 12.5 years undergoing beta decay. What fracti...

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  14. In an n type silicon, which of the following statements is true:

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  15. When a forward bias is applied to a p-n junction, it……

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  16. In half wave rectification, what is the output frequency if the input ...

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  17. ……as a impurity, when added in Si or Ge P- type semiconductor is obtai...

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  18. The charge equivalent to 6 times 10^18 electrons is

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  19. The ratio of electric force and gravitational force between a proton a...

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  20. Unit of surface charge density (sigma) is…….

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