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Electrons are emitted from photo-cell wi...

Electrons are emitted from photo-cell with maximum speed of `4xx10^(8)` cm/s .Its stopping potential will be…..
(Mass of electron `=9xx10^(-31)` kg.

A

30V

B

45V

C

59V

D

Information is insufficient

Text Solution

Verified by Experts

The correct Answer is:
B
`(1)/(w)mv_(max)^(2)=eV_(0)`
`therefore ((1)/(2)xx9xx10^(-31)xx(4xx10^(6))^(2))/(e )=V_(0)`
`therefore(9xx10^(-31)xx16xx10^(12))/(2xx1.6xx10^(-19))=V_(0)`
`therefore V_(0)=45V`
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KUMAR PRAKASHAN-DUAL NATURE OF RADIATION AND MATTER-Section-D (multiple choice questions (MCQs)
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  2. For photosensitive surface threshold wavelength is 5200Å .When monochr...

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  3. Electrons are emitted from photo-cell with maximum speed of 4xx10^(8) ...

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  4. Radiation of 4f(0) frequency is incident on metal surface with f(0) th...

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  5. Work function of metal is phi wavelength of incident light is lambda.W...

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  6. Four photon of lambda gt lambda(0) are incident on metal surface ……..p...

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  7. If ratio of threshold frequencies of two metals is 1:3 ,ratio of their...

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  8. When a piece of sodium or potassium are exposed to sunlight ……..

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  9. If photo-electric effect is not seen with the ultraviolet radiation in...

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  10. Threshold wavelength of metal is 30 Å If radiation of 2000Å Is inciden...

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  11. Work function of metal A,B and C are 4.5 eV 4.3 eV and 3.8eV respectiv...

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  12. What will be maximum value of wavelength by which photo-electric emiss...

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  13. A metal surace objects electrons when hit by green light but none when...

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  14. Photo-electric emission is observed from a metalli surface for frequen...

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  15. If photo-electric effect,when frequency of incident radiation is doubl...

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  16. For metals cesium ,potassium ,sodium and lithium graph of stopping pot...

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  17. Maximum kinetic energy of photoelectron emitted is independent of ……

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  18. In two different experiment X-rays are incident on sodium metal and th...

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  19. Ultraviolet radiation in incident on sodium metal.Then visible light i...

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  20. When monochromatic source is kept at distance of 0.2 m from photocell,...

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