NEET Last 32 Years Solved 1988 – 2019 Physics and Chemistry Video Solutions

In photoelectric emission process from a metal of work function 1.8 eV the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is In photoelectric emission process from a metal of work function 1.8 eV the kinetic energy of most energetic electrons is 0.5 eV. The corresponding stopping potential is August [...]

photoelectric emission occurs only when the incident light has more than a certain minimum photoelectric emission occurs only when the incident light has more than a certain minimum August 21, 2020 Category: Chapter 29 - Dual Nature of Matter and Radiation , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions [...]

Light of two different frequencies whose photons have energies 1eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum speeds of emitted electrons will be: Pick the wrong answer in the context with rainbow. August 21, 2020 Category: Chapter 29 - Dual Nature of Matter and [...]

Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state irradiates a photosensitive material. The stopping potential is measured material to be 3.57 V. The threshold frequency of the material is Pick the wrong answer in the context with rainbow. August 21, 2020 Category: Chapter 29 - Dual Nature [...]

The wavelength λe of an electron and λp of a photon of same energy E are related by The wavelength λe of an electron and λp of a photon of same energy E are related by August 21, 2020 Category: Chapter 29 - Dual Nature of Matter and Radiation , NEET Last 32 Years Solved [...]

When the light of frequency 2v0 (where v0 is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v1. When the frequency of the incident radiation is increased to 5v0, the maximum velocity of electrons emitted from the same plate is v2. The ratio of v1 to v2 is [...]

For photoelectric emission from certain metal, the cut-off frequency is v. If radiation of frequency 2 v impinges on the metal plate, the maximum possible velocity of the emitted electron will be( m is the electron mass) For photoelectric emission from certain metal the cut-off frequency is v. If radiation of frequency 2 v impinges [...]

When the energy of the incident radiation is increased by 20%, kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function [...]

A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and λ/2. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times than in the first case , the work function of the surface of the material is (h=Planck′s constant,c=speed of light) Pick the wrong answer in [...]

When a certain metallic surface is illuminated with monochromatic light of wavelength λ. The stopping potential for photoelectric current is 3V0 and when the same surface is illuminated with light of wavelength 2λ, the stopping potential is V0. The threshold wavelength of this surface for photoelectric effect is Pick the wrong answer in the context [...]