Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET20228 Jul 2022Evening ShiftPhysicsDual Nature of MatterActual

A metal has work function 2.5 eV . If a radiation of frequency 32 10¹⁵ ~Hz is incident on this metal surface, then the maximum kinetic energy of ejected photoelectrons is (Planck's constant, h=6.6 10⁻³⁴ ~J - s )

Options

  1. A9.5 eV
  2. B2.5 eV
  3. C10.7 eV
  4. D12.6 eV

Correct answer

C. 10.7 eV

Step-by-step solution

Frequency of incident radiation, f=3.2 10¹⁵ ~Hz Energy of incident photon E, E=h f aligned & =6.6 10⁻³⁴ 3.2 10¹⁵ & = 6.6 10⁻³⁴ 3.2 10¹⁵ 1.6 10⁻¹⁹ eV & =13.2 eV aligned So, maximum K. E of emitted photoelectrons =E- ₀=13.2-25 ( ₀=2.5 eV . , given )=10.7 eV

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 AP EAMCET PYQs