Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET20228 Aug 2022Evening ShiftPhysicsDual Nature of MatterActual

Photoelectric emission takes place from a certain metal at threshold frequency ' v '. If the radiation of frequency ' 2 v ' is incident on the metal plate, the maximum velocity of the emitted photoelectron will be ( m = mass of electron, h = Planck's constant)

Options

  1. A2 hv m
  2. Bhv 2 ~m
  3. Chv 3 ~m
  4. Dhv m

Correct answer

A. 2 hv m

Step-by-step solution

Einstein's photo electric equation Concept: The maximum kinetic energy of photoelectron is written: 1 2 mv _ m ^2 hv - The threshold frequency is given by hv _ c = Given, v _ c = v , now for radiation with frequency 2 v aligned & 1 2 mv _ m ^2 h (2 v - h ( v )) & v _ m 2 hv m aligned Option (A) is correct.

Practice Dual Nature of Matter on Quantrex Academy →

More from Dual Nature of Matter

The basic principle used behind the working of electron microscope is: 2026The variation of the stopping potential ( V₀ ) with the frequency of incident radiation(n) is as given below. [ n₀ - threshold frequency. h- Planck's constant e- electronic charge] 2026When metal of work function 1.4eV is exposed to a radiation, the maximum kinetic energy of the electron emitted is 0.4eV. The stopping potential required is: 2026A monochromatic beam of photons of intensity to 1.5 Wm⁻² and energy 11.2 eV is incident on a material of work function 4.8 eV. What is the maximum speed of photoelectrons emitted d 2026What is the ratio of de Broglie wavelength of an electron to that of proton if the velocity of proton is 1 6 the velocity of electron? 2026Consider normal incidence of a monochromatic beam of photons of power P on a flat surface. Of the incident beam, 10% gets absorbed, 10% gets transmitted, and the rest is reflected 2026An experimental study of the photoelectric effect involves a metal of work function ₀ . What is the smallest wavelength of the incident photon to photoemit an electron of mass m wh 2026Work function of the metal is 2026 Full Dual Nature of Matter list All MHT CET PYQs