Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202013 Oct 2020Evening ShiftPhysicsDual Nature of MatterActual

Photons of wavelength ' are incident on the cathode of a photocell. Electrons are emitted from the cathode surface. The de-Broglie wavelength of the emitted electrons is (work function is negligible) ( c = velocity of light, h = Planck's constant, m = mass of electron )

Options

  1. Amc 2 ~h
  2. Bh 2 mc
  3. C2 ~h mc
  4. Dmh c

Correct answer

B. h 2 mc

Step-by-step solution

Work function is negligible array l 1 2 mV ²= hc 1 2 m ² ~V ² ~m = hc m ² ~V ²= 2 mhC mV = 2 mhc array aligned de Broglie wavelength &= h mV &= h 2 mhC = h 2 mC aligned

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