MTG NEET Physics
Figure represents a graph of kinetic energy of most energetic photoelectrons Kmax (in eV) and frequency υ for a metal used as cathode in photoelectric experiment. The threshold frequency of light for the photoelectric emission from the metal is
29
Nov
Figure represents a graph of kinetic energy of most energetic photoelectrons Kmax (in eV) and frequency υ for a metal used as cathode in photoelectric experiment. The threshold frequency of light for the photoelectric emission from the metal is as compared to that of B is: The figure shows stopping potential Vs and frequency υ [...]
For a certain metal, incident frequency υ is five times of threshold frequency υ0 and the maximum velocity of coming out photoelectrons is 8×10^6ms−1 If υ=2υo, the maximum velocity of photoelectrons will be.
29
Nov
For a certain metal, incident frequency υ is five times of threshold frequency υ0 and the maximum velocity of coming out photoelectrons is 8×10^6ms−1 If υ=2υo, the maximum velocity of photoelectrons will be. For a certain metal incident frequency υ is five times of threshold frequency υ0 and the maximum velocity of coming out photoelectrons [...]
The figure shows stopping potential Vs and frequency υ for two different metallic surfaces A and B. The work function of A, as compared to that of B is:
29
Nov
The figure shows stopping potential Vs and frequency υ for two different metallic surfaces A and B. The work function of A, as compared to that of B is: as compared to that of B is: The figure shows stopping potential Vs and frequency υ for two different metallic surfaces A and B. The work [...]
A and B are two metals with threshold frequencies 1.8×10^14Hz and 2.2×10^4Hz. Two identical photons of energy 0.825 eV each are incident on them. Then photoelectrons are emitted by (Take h = 6.6×10^−34J−s)
29
Nov
A and B are two metals with threshold frequencies 1.8×10^14Hz and 2.2×10^4Hz. Two identical photons of energy 0.825 eV each are incident on them. Then photoelectrons are emitted by (Take h = 6.6×10^−34J−s) If in a photoelectric cell the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping [...]
Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons, then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ]
29
Nov
Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons, then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ] Light [...]
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Light rays of wavelengths 6000A ˚and of photon intensity 39.6 watts/m^2 incidents on a metal surface. If only 1% of photons incident on the surface emit photoelectrons ,
then the number of electrons emitted per second per unit area from the surface will be : [Planck constant h=6.64×10^−34 Js; Velocity of light =3×10^8 m/s ] ,
What retarding potential is necessary to stop the emission of photoelectrons, if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm)
29
Nov
What retarding potential is necessary to stop the emission of photoelectrons, if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm) if the work function of the target material is 1.24 eV and wavelength of incident light is 436 nm? (Take hc=1240eVnm) What retarding [...]
When the electromagnetic radiations of frequencies 4×10^15Hz and 6×10^15Hz fall on the same metal, in different experiments, the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold frequency for the metal is
29
Nov
When the electromagnetic radiations of frequencies 4×10^15Hz and 6×10^15Hz fall on the same metal, in different experiments, the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold frequency for the metal is in different experiments the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold [...]
If in a photoelectric cell, the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be
29
Nov
If in a photoelectric cell, the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be If in a photoelectric cell the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be November 29, 2020 Category: Chapter [...]
The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the threshold wavelength λ for sodium is 5460 A ˚, the value of λ for tungsten is
29
Nov
The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the threshold wavelength λ for sodium is 5460 A ˚, the value of λ for tungsten is the value of λ for tungsten is The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the [...]
Two identical spheres P and Q lie on a smooth horizontal circular groove at opposite ends of a diameter. P is projected along the groove and at the end of time t, it impinges on Q . If e is the coefficient of restitution, the second impact will occur after a shortest time of
27
Nov
Two identical spheres P and Q lie on a smooth horizontal circular groove at opposite ends of a diameter. P is projected along the groove and at the end of time t, it impinges on Q . If e is the coefficient of restitution, the second impact will occur after a shortest time of it [...]