Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JIPMER 2017
Exam
JIPMER
Year
2017
Subject
Physics
Chapter
Dual Nature of Matter

JIPMER 2017 · Physics · Dual Nature of Matter

A photo cell is illuminated by a small bright source placed 1m...

A photo cell is illuminated by a small bright source placed 1m away. When the same source of light is placed 2 m away, the electrons emitted by photo cathode

Options

  1. Acarry one quarter of their previous energy
  2. Bcarry one quarter of their previous momenta
  3. Care half as numerous
  4. Dare one quarter as numerous

Correct answer

D. are one quarter as numerous

Step-by-step solution

I \propto(1d2)\left(\frac{1}{d^2}\right) when source is placed 2 m away, then I′=I/4I^{\prime}=I / 4. The number of electrons emitted is directly proportional to intensity. Hence, number of emitted electrons is reduced to one-fourth.
Practice Dual Nature of Matter on Quantrex Academy →

More from Dual Nature of Matter

An electron and positron are accelerated from rest to the same kinetic energy. The ratio… MHT CET Medical 2026An electron of mass m and charge e initially at rest gets accelerated by a constant… MHT CET Medical 2026The wavelength λ_e of an electron and λ_P of a photon of same energy E are related as MHT CET Medical 2026A light of wavelength λ(λ < λ_0) falls on a metal surface. The momentum of the fastest… MHT CET Medical 2026The de Broglie wavelength of an electron with kinetic energy K_1 is λ_1 . If the kinetic… MHT CET Medical 2026A student plots two different graphs using the same photoelectric experiment data. 1.… MHT CET Medical 2026In a photoelectric cell, for the incident radiation of wavelength λ , the fastest… MHT CET Medical 2026A particle is dropped from a height ' y '. The de-Broglie wavelength of the particle as a… MHT CET Medical 2026 Full Dual Nature of Matter list All JIPMER PYQs