Select the incorrect statement regarding photoelectric effectThe number of ejected electrons do not depends upon the frequency of light.The kinetic energy of ejected electrons depends upon the frequency of the light usedThe number of the ejected electrons is proportional to the intensity of the light usedThere is a time lag between the striking of light and ejection of electrons

in photoemmission the number of photoelectrons ejected per second depend on

From the photoelectric effect experiment, following observations are made. Identify which of these are correctA. The stopping potential depends only on the work function of the metal.B. The saturation current increases as the intensity of incident light increases.C. The maximum kinetic energy of a photo electron depends on the intensity of the incident light.D. Photoelectric effect can be explained using wave theory of light.Choose the correct answer from the options given below:B, C onlyA, C, D onlyB onlyA, B, D only

What happens to electrons in the photoelectric effect?A.They are made to orbit faster.B.They are knocked away from atoms.C.They are turned into light.D.They are added to atoms.

In order to explain the results of a photoelectric effect experiment, quantum physics suggests that:(select all that apply)Question 3Answera.light energy is quantised (in the form of photons)b.electron energies are quantised into levelsc.electrons store the energy from several photons to build up and excite over time.d.electrons can interact with photons only on an all or nothing basise.electrons can absorb any energyf.electrons can only be ejected from a metal with an excess negative chargeCheckQuestion 3

10. Choose the incorrect statement(a) The number of photoelectrons emitted is proportional to light intensity(b) The velocity of photoelectrons is proportional to the frequency of light(c) Photoelectric effect is an instantaneous process.(d) Stopping potential is independent of incident frequency.11. Choose the incorrect statement. In the Compton scattering-(a) The increase in wavelength ∆𝜆, is independent of the incident wavelength.(b) Compton wavelength is always a constant quantity.(c) The wavelength increase, ∆𝜆, depends on the scattering angle of the photon(d) The wavelength increase is independent of the scattering angle of a photon.12. The phase speed of matter waves for a relativistic free moving particle in a vacuum is;(a) Equal to the speed of light in a vacuum(b) Less than the speed of light in a vacuum(c) More than the speed of light in a vacuum(d) Equal to half the speed of light in a vacuum