Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET2004PhysicsDual Nature of Matter

Electrons ejected from the surface of a metal, when light of certain frequency is incident on it, are stopped fully by a retarding potential of 3 volts. Photoelectric effect in this metallic surface begins at a frequency 6 10¹⁴ ~s ⁻¹ . The frequency of the incident light in s ⁻¹ is : [Planck's constant =6.4 10⁻³⁴ Js , charge on the electron .=1.6 10⁻¹⁹ C ]

Options

  1. A7.5 10¹³
  2. B13.5 10¹³
  3. C13.5 10¹⁴
  4. D7.5 10¹⁵

Correct answer

C. 13.5 10¹⁴

Step-by-step solution

Einstein's photoelectric equation is given by aligned h v & =h v₀+ =h v₀+e V v & =v₀+ e V₀ h = (6 10¹⁴ )+ (1.6 10⁻¹⁹ )(3) (6.4 10⁻³⁴ ) & =13.5 10¹⁴ s⁻¹ 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 AP EAMCET PYQs