1

WB JEE 2020

MCQ (Single Correct Answer)

+1

-0.25

A nucleus X emits a $$\beta $$-particle to produce a nucleus Y. If their atomic masses are M

_{x}and M_{y}respectively, then the maximum energy of the $$\beta $$-particle emitted is (where, m_{e}is the mass of an electron and c is the velocity of light)2

WB JEE 2020

MCQ (Single Correct Answer)

+1

-0.25

For nuclei with mass number close to 119 and 238, the binding energies per nucleon are approximately 7.6 MeV and 8.6 MeV, respectively. If a nucleus of mass number 238 breaks into two nuclei of nearly equal masses, what will be the approximate amount of energy released in the process of fission?

3

WB JEE 2019

MCQ (Single Correct Answer)

+1

-0.25

A parent nucleus X undergoes $$\alpha$$-decay with a half-life of 75000 yrs. The daughter nucleus Y undergoes $$\beta$$-decay with a half-life of 9 months. In a particular sample, it is found that the rate of emission of $$\beta$$-particles is nearly constant (over several months) at $${10^7}/h$$. What will be the number of $$\alpha$$-particles emitted in an hour?

4

WB JEE 2017

MCQ (Single Correct Answer)

+1

-0.25

When light of frequency v

_{1}is incident on a metal with work function W (where hv_{1}> W), then photocurrent falls to zero at a stopping potential of V_{1}. If the frequency of light is increased to v_{2}, the stopping potential changes to V_{2}. Therefore, the charge of an electron is given byQuestions Asked from Dual Nature of Radiation (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

WB JEE Subjects

Physics

Mechanics

Units & Measurements
Vector Algebra
Motion
Laws of Motion
Work Power & Energy
Center of Mass
Rotational Motion
Properties of Matter
Heat and Thermodynamics
Simple Harmonic Motion
Waves
Gravitation

Electricity

Optics

Modern Physics

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry
Atomic Structure
Redox Reaction
Gaseous State
Chemical Equilibrium
Liquid Solution
Ionic Equilibrium
Thermodynamics
Chemical Kinetics
Radioactivity and Nuclear Chemistry
Electrochemistry
Solid State
Surface Chemistry

Inorganic Chemistry

Periodic Table
Chemical Bonding
Metallurgy
Hydrogen and It's Compounds
Some s Block Elements
Some P Block Elements
d and f Block Elements
Coordination Compounds

Organic Chemistry

Mathematics

Algebra

Logarithms
Sequence and Series
Quadratic Equations
Complex Numbers
Permutations and Combinations
Mathematical Induction and Binomial Theorem
Matrices and Determinants
Vector Algebra
Three Dimensional Geometry
Probability
Statistics
Sets and Relations

Trigonometry

Coordinate Geometry

Calculus