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The anode voltage of a photocell is kept...

The anode voltage of a photocell is kept fixed. The wavelength `lamda` of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows:

A

B

C

D

Text Solution

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The correct Answer is:
D
As `lambda` is increased, there will be a value of `lambda` above which photoelectrons will be cease to come out so photocurrent will beocme zero. Hence `(4)` is correct answer.
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RESONANCE ENGLISH-ATOMIC PHYSICS-Exercise -3 part -I JEE (Advanced)
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  4. In a hydrogen like atom electron makes transition from an energy level...

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  5. Hydrogen (.(1)H^(1)), Deuterium (.(1)H^(2)), singly ionised Helium (...

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  12. Draw a schematic diagram of the experiment used by. Davisson and Germe...

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  13. The two lines A and B in fig. shows the plot of de- Broglie wavelength...

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  14. Fig. shows the variation of stopping potential V0 with the frequency v...

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  15. The ground state energy of hydrogen atom is -13.6 eV. (i) What is...

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  16. The stopping potential in an experiment on photoelectric effect is 1.5...

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  17. Define ionisation energy . What is its value for a hydrogen atom ?

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  18. Write Einstein's photoelectric equation . State clearly the three sali...

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