Question Answers
Sahay Sir > Question Answers
If maximum velocity with which an electron can be emitted from a photo cell is 4 x 10^8 cm/sec, the stopping potential is ( mass of electron = 9 x 10^-31 kg )
13
Sep
If maximum velocity with which an electron can be emitted from a photo cell is 4 x 10^8 cm/sec, the stopping potential is ( mass of electron = 9 x 10^-31 kg ) If maximum velocity with which an electron can be emitted from a photo cell is 4 x 10^8 cm/sec the stopping potential [...]
The figure shows different graphs between stopping potential (V0) and frequency (v) for photosensitive surface of cesium , potassium , sodium and lithium. The plots are parallel. Correct ranking of the targets according to their work function greatest first will be
13
Sep
The figure shows different graphs between stopping potential (V0) and frequency (v) for photosensitive surface of cesium , potassium , sodium and lithium. The plots are parallel. Correct ranking of the targets according to their work function greatest first will be potassium sodium and lithium. The plots are parallel. Correct ranking of the targets according [...]
The minimum wavelength of radiation coming from the tungsten target (collector ) is
13
Sep
The minimum wavelength of radiation coming from the tungsten target (collector ) is The minimum wavelength of radiation coming from the tungsten target (collector ) is September 13, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A photosensitive metallic surfaces has work function hv0 . If photon of 2 hv0 fall on the surface ,the electrons come out with a maxiumum velocity of 4×106m/s . If energy of photon is increased to 5 hv0 , the maximum velocity of photo electrons will be :
13
Sep
A photosensitive metallic surfaces has work function hv0 . If photon of 2 hv0 fall on the surface ,the electrons come out with a maxiumum velocity of 4×106m/s . If energy of photon is increased to 5 hv0 , the maximum velocity of photo electrons will be : A photosensitive metallic surfaces has work function [...]
When a metal surface is illuminated by light wavelengths 400 nm and 250 nm , the maximum velocities of the photoelectrons ejected are υ and 2v respectively . The work function of the metal is ( h = Planck’s constant, c = velocity of light in air)
13
Sep
When a metal surface is illuminated by light wavelengths 400 nm and 250 nm , the maximum velocities of the photoelectrons ejected are υ and 2v respectively . The work function of the metal is ( h = Planck’s constant, c = velocity of light in air) c = velocity of light in air) the [...]
The collecter of the photocell (in photoelectric experiment ) is made of tugsten while the emitter is Platinum having work function of 10eV .Monochromotic radiation of wavelength 124Å & power 100 watt is incident on emitter which emits photo electrons with a quantum efficiency of 1% .The accelerating voltage acros the photocell is of 10,000 volts (Use: hc=12400eVÅ ) The minimum wavelength of radiation coming from the tungsten target (collector) is
13
Sep
The collecter of the photocell (in photoelectric experiment ) is made of tugsten while the emitter is Platinum having work function of 10eV .Monochromotic radiation of wavelength 124Å & power 100 watt is incident on emitter which emits photo electrons with a quantum efficiency of 1% .The accelerating voltage acros the photocell is of 10,000 [...]
Tags:
2f is greater than threshold frequency of B ) ,
the ratio of the maximum kinetic energy of photoelectrons emitted is ( f is greater than threshold frequency of A ,
The work functions of metals A and B are in the ratio 1 : 2 . If light of frequencies f and 2f are incident on the surfaces of A and B respectively ,
The work functions of metals A and B are in the ratio 1 : 2 . If light of frequencies f and 2f are incident on the surfaces of A and B respectively , the ratio of the maximum kinetic energy of photoelectrons emitted is ( f is greater than threshold frequency of A, 2f is greater than threshold frequency of B )
13
Sep
The work functions of metals A and B are in the ratio 1 : 2 . If light of frequencies f and 2f are incident on the surfaces of A and B respectively , the ratio of the maximum kinetic energy of photoelectrons emitted is ( f is greater than threshold frequency of A, 2f [...]
Tags:
2f is greater than threshold frequency of B ) ,
the ratio of the maximum kinetic energy of photoelectrons emitted is ( f is greater than threshold frequency of A ,
The work functions of metals A and B are in the ratio 1 : 2 . If light of frequencies f and 2f are incident on the surfaces of A and B respectively ,
Light of wavelength λ strikes a photo – sensitive surface and electrons are ejected with kinetic energy is to be increased to 2E , the wavelength must be changed to λ’ where
13
Sep
Light of wavelength λ strikes a photo – sensitive surface and electrons are ejected with kinetic energy is to be increased to 2E , the wavelength must be changed to λ’ where Light of wavelength λ strikes a photo - sensitive surface and electrons are ejected with kinetic energy is to be increased to 2E [...]
From the figure describing photoelectric effect we may infer correctly that
13
Sep
From the figure describing photoelectric effect we may infer correctly that From the figure describing photoelectric effect we may infer correctly that September 13, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
Five elements A,B,C,D and E have work functions 1.2eV, 2.4eV ,3.6eV, 4.8eV and 6eV respectively . If light of wavelength 4000Å is allowed to fall on these elements , then photo electrons are emitted by
13
Sep
Five elements A,B,C,D and E have work functions 1.2eV, 2.4eV ,3.6eV, 4.8eV and 6eV respectively . If light of wavelength 4000Å is allowed to fall on these elements , then photo electrons are emitted by 2.4eV 3.6eV 4.8eV and 6eV respectively . If light of wavelength 4000Å is allowed to fall on these elements B [...]