List of top Chemistry Questions on Photoelectric Effect asked in BITSAT

When a metal surface is illuminated by light of wavelengths 400nm and 250nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is
Find the number of photons emitted per second by a 25 watt source of monochromatic light of wavelength 6600AA. What is the photoelectric current assuming 3% efficiency for photoelectric effect?
When 0.50AA X-rays strike a material, photoelectrons from the K shell are observed to move in a circle of radius 23mm in a magnetic field of 2×10⁻2T acting perpendicular to the direction of emission. What is the binding energy of K-shell electrons?
The beam of light has three wavelengths 4144AA, 4972AA, 6216AA with a total intensity of 3.6×10⁻3W/m² equally distributed among the three wavelengths. The beam falls normally on a clean metallic surface of work function 2.3eV. Assuming no loss by reflection and that each photon ejects one photoelectron, calculate the number of photoelectrons liberated in 2s.
When a metal surface is illuminated by light of wavelength 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck’s constant, c = velocity of light in air)
Find the number of photons emitted per second by a 25W source of monochromatic light of wavelength 6600AA. What is the photoelectric current assuming 3% efficiency for photoelectric effect?
When \(0.5\,\text{\AA}\) X-rays strike a material, the photoelectrons from the K-shell are observed to move in a circular path of radius \(23\,\text{mm}\) in a magnetic field of \(2 \times 10^{-2}\,\text{T}\), perpendicular to the direction of emission of photoelectrons. What is the binding energy of K-shell electrons?
The beam of light has wavelengths \(4144\,\text{\AA}\), \(4972\,\text{\AA}\), and \(6216\,\text{\AA}\) with a total intensity of \(3.6 \times 10^{-3}\,\text{W m}^{-2}\) equally distributed among the three wavelengths. The beam falls normally on an area of \(1\,\text{cm}^2\) of a clean metallic surface of work function \(2.3\,\text{eV}\). Assume that there is no loss of light by reflection and that each energetically capable photon ejects one electron. Calculate the number of photoelectrons liberated in \(2\,\text{s}\).

Graph between stopping potential of most energetic emitted photoelectrons (\(V_s\)) and frequency (\(\nu\)) of incident radiation on metal is given. Value of slope AB/BC in graph is [where \(h\) = Planck’s constant, \(e\) = electronic charge]: 

The threshold wavelength of tungsten is \(2300\,\text{\AA}\). If ultraviolet light of wavelength \(1800\,\text{\AA}\) is incident on it, then the maximum kinetic energy of photoelectrons would be about:
In an experiment on photoelectric effect photons of wavelength 300 nm eject electrons from a metal of work function 2.25 eV. A photon of energy equal to that of the most energetic electron corresponds to the following transition in the hydrogen atom:
A light having wavelength 300 nm falls on a metal surface. The work function of metal is 2.54 eV, what is stopping potential?
The photoelectric threshold of a metal is 2000. The energy of electrons ejected from the surface by ultraviolet light of wavelength 1500 is