List of top Physics Questions on Photoelectric Effect asked in KEAM

The work function of a material is $6.6 \text{ eV}$. Then, the threshold wavelength of the metal is approximately (Take $h = 6.6 \times 10^{-34} \text{J.s}$)}

Two light rays of wavelength \(\lambda\) and \(\frac{\lambda}{4}\) incident on the surface of a photo sensitive material emit electrons with max kinetic energy \(E\) and \(6E\) respectively. The work function of the material is (\(h\) = Planck’s constant, \(c\) = velocity of light in free space)

If the energy of the incident radiation on a metal is increased by $10%$, the kinetic energy of the emitted photoelectrons increases from $0.5,eV$ to $0.75,eV$, then the work function of the metal is

The work functions of two metals are 2.75 eV and 2 eV respectively. If these are irradiated by photons of energy 3 eV, the ratio of maximum momenta of the photoelectrons emitted respectively by them is

The work function for a metal having threshold frequency $5\times 10^7\text{ Hz}$ is?

The plot of maximum kinetic energy of photo-electrons vs the energy of incident photons above threshold frequency is ________.

It takes $4.6$ eV to remove one of the least tightly bound electrons from a metal surface. When monochromatic photons strike the metal surface, electrons having kinetic energy from zero to $2.2$ eV are ejected. What is the energy of the incident photons?

The maximum velocities of the photoelectrons ejected are \(v\) and \(2v\) for incident light of wavelength \(400\,nm\) and \(250\,nm\) respectively. The work function of the metal in terms of Planck’s constant \(h\) and velocity of light \(c\) is

If the frequency of incident light falling on a photosensitive metal is doubled, the kinetic energy of the emitted photoelectron is

If the frequency of incident light falling on a photosensitive metal is doubled, the kinetic energy of the emitted photoelectron is

If the frequency of incident light falling on a photosensitive metal is doubled, the kinetic energy of the emitted photoelectron is