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A photocell is illuminated by a small br...

A photocell is illuminated by a small bright source placed 1 m away . When the same source of light is placed `(1//2)` m away , the photocathode would

A

increases by a factor 4

B

decreases by a factor 4

C

increases by a factor 2

D

decreases by a factor 2

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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-EXERCISE-I
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  2. According to Einstein's photoelectric equation, the graph of kinetic e...

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

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  4. Assertion : Photoelectric effect supports the quantum nature of light....

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  5. Pick out wrong statement

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  6. Consider an infinite distribution of point masses (each of mass m) pla...

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  7. Statement (A): Every photon striking the metal and colliding with the ...

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  8. The slope of the graph drawn between stopping potential and frequency ...

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  9. The principle of photo cell is

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  10. The correct statement is :

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  11. Flowers are unisexual in :

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  12. A long solenoid having n = 200 turns per metre has a circular cross-se...

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  13. The threshold frequency for a metallic surface corresponds to an energ...

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  14. The mass of electron varies with

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  15. The wavelengths of a photon, an electron and a uranium nucleus are sam...

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  16. The matter waves are

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  17. The wave nature of electron is verified by

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  18. The De- broglie wavelength associated with a matter particle is

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  19. The ratio of wavelength of a photon and that of an electron of same en...

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  20. Enthalpy change of a reaction with be equal to

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