Dual Nature of radiations and matter Mock Test (Physics) MHT CET 2021

When a light of wavelength 4000 Å falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, light of wavelength 6000 Å is sufficient for photo emission. The work functions of the two emitters are in the ratio of

Light of two different frequencies whose photons have energies 1eV and 2.5eV respectively, successively illuminate a metallic surface whose work function is 0.5eV. Ratio of maximum speeds of emitted electrons will be

When the light of frequency 2v0 (where v0 is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v1. When the frequency of the incident radiation is increased to 5v0, the maximum velocity of electrons emitted from the same plate is v2. The ratio of v2 to v2 is

For photoelectric emission from certain metal the cut – off frequency is v. If radiation of frequency 2 v impinges on the metal plate , the maximum possible velocity of the emitted electron will be (m is the electron mass).

An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. Its final velocity will be

The photoelectric threshold wavelength of silver is 3250×10^−10. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536×10^−10m is (Given h=4.14×10^−15eVs and c=3×10^8ms−1)

When monochromatic light of wavelength λ illuminates a metal surface, then stopping potential for photo electric current is 3V(0). If wavelength changes to 2λ then stopping potential becomes V(0) Threshold wavelength for photo electric emission is:

The energy of an electron having de-broglie wavelength λ is (h = Plank’s Constant and m= mass of electron)

Photons with energy 5eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is

An electron of mass m, when accelerated through a potential difference V has de Broglie wavelength λ. The de Broglie wavelength associated with a proton of mass M accelerated through the same potential difference, will be