MHT CET 2019 2nd May Evening Shift | Dual Nature of Radiation Question 117 | Physics

A metal surface is illuminated by light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one fourth of its original value then the maximum KE of the emitted photoelectrons would be

twice the original value

four times the original value

one fourth of the original value

unchanged

MHT CET 2019 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

When photons of energy $h v$ fall on a metal plate of work function ' $W_0$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

$K+W_0$

$K+h v$

$\mathrm{K}$

$\mathrm{2 K}$

MHT CET 2019 2nd May Morning Shift

MCQ (Single Correct Answer)

-0

The maximum velocity of the photoelectron emitted by the metal surface is ' $v$ '. Charge and mass of the photoelectron is denoted by ' $e$ ' and ' $m$ ' respectively. The stopping potential in volt is

$\frac{v^2}{2\left(\frac{m}{e}\right)}$

$\frac{v^2}{2\left(\frac{e}{m}\right)}$

$\frac{v^2}{\left(\frac{e}{m}\right)}$

$\frac{v^2}{\left(\frac{m}{e}\right)}$

MHT CET Subjects

Browse all chapters by subject

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Atomic Structure States of Matter Thermodynamics Chemical Equilibrium Ionic Equilibrium Liquid Solution Redox Reactions Surface Chemistry Solid State Electrochemistry Chemical Kinetics Nuclear Chemistry

Inorganic Chemistry

Periodic Table and Periodicity Chemical Bonding and Molecular Structure Metallurgy Hydrogen and It's Compounds s-Block Elements p-Block Elements d and f Block Elements Coordination Compounds Environmental Chemistry

Organic Chemistry

IUPAC Nomenclatures General Organic Chemistry Isomerism Hydrocarbons Haloalkanes and Haloarenes Alcohol, Phenols and Ethers Aldehyde and Ketone Carboxylic Acids and Its Derivatives Compounds Containing Nitrogen Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry