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When an inert gas is filled in the place...

When an inert gas is filled in the place vacuum in a photo cell , then

A

Photo - electric current is decreased

B

Photo - electric current is increased

C

Photo - electric current remains the same

D

Decrease or increase in photo - electric in photo - electric current does not depend upon the gas filled

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Verified by Experts

The correct Answer is:
B
In the pressure of inert gas photoelectrons emitted by cathode ionize the gas by collision and hence the current increases.
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A2Z-DUAL NATURE OF RADIATION AND MATTER-Section D - Chapter End Test
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  2. The magnitude of saturation photoelectric current depends upon

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  3. For photoelectric emission , tungsten requires light of 2300 Å. If lig...

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  4. The light rays having photons of energy 1.8 eV are falling on a metal ...

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  5. A photon of energy 8 eV is incident on metal surface of threshold fre...

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  6. In the diagram a graph between the intensity of X-rays emitted by a mo...

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  7. The maximum value of stopping potential in the following diagram is

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  8. The variation of wavelength lambda of the K(alpha) line with atomic nu...

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  9. From the figure describing photoelectric effect we may infer correctly...

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  10. When an inert gas is filled in the place vacuum in a photo cell , then

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  11. A photon of 1.7 xx 10^(-13) joules is absorbed by a material under spe...

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  12. The maximum velocity of an electron emitted by light of wavelength lam...

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  13. When a monochromatic point source of light is at a distance of 0.2 m...

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  14. Which of the following has the least value of (q)/(m)?

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  15. When green light is incident on the surface of metal , it emits photo ...

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  16. An electron is moving through a field. It is moving (i) opposite an e...

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  17. The figure shows different graphs between stopping potential (V(0)) an...

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  18. The K(alpha) X - rays arising from a cobalt (z = 27) target have a w...

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  19. Assertion : In the process of photoelectric emission , all the emitted...

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  20. Assertion : Soft and hard X-rays differ in frequency as well as veloci...

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