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Stopping potential for photo electrons...

Stopping potential for photo electrons

A

Does not depend on the frequency of the incident light

B

Does not depend upon the nature of the cathode material

C

Depends on both the frequency of the incident light and nature of the cathode material

D

Depends upon the intensity of the incident light

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The stopping potential for photoelectrons ejected from a surface by 375 nm photons is 1.870 V. Calculate the stopping potential for 600 nm photons .

The stopping potential for photoelectrons from a metal surface is V_(1) when monochromatic light of frequency upsilon_(1) is incident on it. The stopping potential becomes V_(2) when monochromatic light of another frequency is incident on the same metal surface. If h be the Planck’s constant and e be the charge of an electron, then the frequency of light in the second case is:

The work function of potassium is 2.0 eV. When it is illuminated by light of wavelength 3300A^(@) photo electrons are emitted. The stopping potential of photo electrons is [Plank’s constant h=6.6 xx 10^(-34)Js,1eV=1.6 xx 10^(-19)J,C=3 xx 10^(8)ms^(-1) ]

In an experiment of photo-electric effect, the graph of maximum kinetic energy E_(k) of the emitted photoelectrons versus the frequency v of the incident light is a straight line AB as shown in figure below : Stopping potential for the photoelectrons emitted by the light of frequency v=30xx10^(14)Hz

Photoelectrons ar ejected from a surface when light of wavelenght lamda_1=550 nm is incident on it. The stopping potential for such electrons is lamda_(S1)=0.19V . Suppose that radiation of wavelength lamda_2=190nm is incident of the surface. Q. Calculate the stopping potential V_(S2) .

The electric field of light wave is given as vec(E )=10^(-3)cos((2pi x)/(5xx10^(-7))-2pixx6xx10^(14)t)hat(x)(N)/(C ) This light falls on a metal plate of work function 2eV. The stopping potential of the photo-electrons is : Given E (in eV) = (12375)/(lambda("in"Å))

The electric field of light wave is given as vec(E)=10^(-3)cos((2 pi x)/(5xx10^(-7))-2pi xx 6xx10^(14)t) hat(x) (N)/(C) . This light falls on a metal plate of work function 2 eV. The stopping potential of the photo-electrons is: Given, E (in eV) = (12375)/(lambda ( "in" Å ))

An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photo-sensitive material having work function 2.75eV . If the stopping potential of the photoelectron is 10V , the value of n is

When a certain photosensistive surface is illuminated with monochromatic light of frequency v, the stopping potential for the photo current is V_(0)//2 . When the surface is illuminated by monochromatic light of frequency v//2 , the stopping potential is V_(0) . The threshold frequency gor photoelectric emission is :

Graph of incident freuency with stopping potential in photoelectric effect is

AAKASH INSTITUTE ENGLISH-DUAL NATURE OF RADIATION AND MATTER -ASSIGNMENT SECTION A. Objective (Only one answer)
  1. The photo-electrons emitted from a surface of sodium metal are such th...

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  2. A photo-cell is illuminated by a source of light, which is placed at a...

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  3. Stopping potential for photo electrons

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  4. The maximum wavelength of radiation that can produce photoelectric eff...

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  5. Assuming photoemission to take place , the factor by which the maximum...

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  6. The stopping potential V for photoelectric emission from a metal surfa...

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  7. In an experiment on photoelectric effect the frequency f of the incide...

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  8. If the work function of a metal is 'phi' and the frequency of the inci...

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  9. The threshold frequency for a metallic surface correponds to an energy...

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  10. Two identical photocathodes receive light of frequencies v(1) and v(2)...

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  11. Specific heat of water is 4.2 J//g.^(@)C. If light of frequency 3 xx 1...

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  12. A red bulb and violet bulb of equal power emits n(R ) and n(v) number ...

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  13. For a certain metal, incident frequency v is five times of threshold f...

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  14. Ultraviolet light of wavelength 66.26 nm and intensity 2 W//m^(2) fall...

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  15. Two sources A and B have same power . The wavelength of radiation of A...

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  16. The work function of a certain metal is 2.3 eV. If light of wave numbe...

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  17. When the electromagnetic radiations of frequencies 4 xx 10^(15) Hz and...

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  18. If the velocity of an electron is doubled, its de-Broglie frequency wi...

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  19. The duration of a laser pulse is 10^(-8) s. The uncertainly in its ene...

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  20. A proton and an alpha-particle are accelerated through the same potent...

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