Photoelectric Effect Questions

For photoelectric emission from certain metal the cutoff frequency is ν. If radiation of frequency 2ν impinges on the metal plate, the maximum possible velocity of the emitted electron will ...

A certain metallic surface is illuminated with monochromatic light of wavelength, λ. The stopping potential for photo-electric current for this light is 3V0. if the same surface is illuminated wi...

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m, is :-

The photoelectric threshold wavelength of silver is 3250 × 10-10m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536×10-10 m is :- (Given h =...

An electron of mass m and a photon have same energy E. the ratio of de-Broglie wavelengths associatedwith them is:

When a metallic surface is illuminated with radiation of wavelength λ, the stopping potential is V. If the samesurface is illuminated with radiation of wavelength 2λ, the stopping potential ...

An electron of mass m with an initial velocity V→=V0i^(V0>0) enters an electric field E→=-E0i^ (E0 = constant >0) at t = 0. If λ0 is its de-Broglie wavelength initially, then i...

The wavelength λe of an electron and λp of a photon of same energy E are related by:

A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these wavelengths are u1 and u2, respectively. If the ...

When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is...

If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is

Hydrogen atom in ground state is excited by a monochromatic radiation of λ = 975. Number ofspectral lines in the resulting spectrum emitted will be...

The binding energy per nucleon of and nuclei are 5.60 MeV and 7.06 MeV, respectively. In the nuclear reaction Li + H → He + He + Q, the value of energy Q released is...

A point source causes photoelectric effect from a small metal plate. Which of the following curves may represent the saturation photocurrent as a function of the distance between the source and the me...

In a fission reaction 23692U 117X + 117Y + n + nthe average binding energy per nucleon of X and Y is 8.5 MeV whereas that of 236U is 7.6 MeV. The total energy liberated will be about :...

The radiation corresponding to 3 → 2 transition of hydrogen atoms falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of 3 × 10-4 T. If th...

The anode voltage of photocell is kept fixed. The wavelength λ of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows :...

A 200 W sodium street lamp emits yellow light of wavelength 0.6 μm. Assuming it to be 25% efficientin converting electrical energy to light, the number of photons of yellow light it emits per sec...

Photoelectric emission occurs only when the incident light has more than a certain minimum

In photoelectric emission process from a metal of workfunction 1.8 eV, the kinetic energymost energetic electron is 0.5 eV. The corresponding stopping potentail is