PREVIOUS NEXT
1
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
What is the frequency ' $\nu$ ' of the electron in Bohr's first orbit of radius ' $r$ ' of the hydrogen atom?
A
$v=\frac{e^2}{4 \pi \varepsilon_0 h r}$
B
$v=\frac{e^2}{2 \pi \varepsilon_0 h r^2}$
C
$v=\frac{e^2}{4 \pi \varepsilon_0 h r^2}$
D
$v=\frac{e^2}{2 \pi \varepsilon_0 h r}$
2
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
To get 300 MW electric power for half an hour, how much mass is to be completely converted into energy?
A
$6 \times 10^{-2} \mathrm{~kg}$
B
$3 \times 10^{-6} \mathrm{~kg}$
C
$6 \times 10^{-3} \mathrm{~kg}$
D
$6 \times 10^{-6} \mathrm{~kg}$
3
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
Fusion reaction is more energetic than fission reaction because
A
Uncontrolled chain reaction is taking place In the fusion reaction.
B
Fusion reaction is taking place at very high temperature
C
The energy released per unit mass of the fuel in fusion reaction is larger than the energy released per unit mass of the fuel in fission reaction.
D
In the fusion reaction lighter nuclei combine to form a heavier nucleus
4
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
The nucleus of oxygen atom contains 8 protons and 8 neutrons. What is the mass defect in amu? [Given Mass of proton $=1.00727 \mathrm{amu}$ Mass of neutron $=1.00866 \mathrm{amu}$ and the mass of oxygen nucleus $=15.99053 \mathrm{amu}$. ]
A
0.12691 amu
B
0.13692 amu
C
0.13691 amu
D
0.12961 amu
PREVIOUS NEXT

COMEDK Subjects

Browse all chapters by subject

Physics
Mechanics
Units & Measurements Vector Algebra Motion Laws of Motion Circular Motion Work, Energy and Power Center of Mass and Collision Rotational Motion Elasticity Fluid Mechanics Heat and Thermodynamics Gravitation Simple Harmonic Motion Waves
Optics
Wave Optics Ray Optics
Electromagnetism
Capacitor Electromagnetic Induction Electrostatics Moving Charges and Magnetism Alternating Current Magnetism and Matter Current Electricity Electromagnetic Waves
Modern Physics
Semiconductor Devices and Logic Gates Atoms and Nuclei Dual Nature of Radiation Communication Systems
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
Metallurgy Periodic Table and Periodicity Hydrogen and It's Compounds p-Block Elements Environmental Chemistry Coordination Compounds d and f Block Elements s-Block Elements Chemical Bonding and Molecular Structure
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
Mathematics
Algebra
Sets and Relations Logarithms Complex Numbers Quadratic Equations Sequences and Series Permutations and Combinations Probability Binomial Theorem Vector Algebra Three Dimensional Geometry Matrices and Determinants Statistics Mathematical Reasoning Linear Programming
Trigonometry
Properties of Triangles Trigonometric Ratios & Identities Inverse Trigonometric Functions Trigonometric Equations
Coordinate Geometry
Hyperbola Ellipse Straight Lines and Pair of Straight Lines Circle Parabola
Calculus
Differentiation Functions Limits, Continuity and Differentiability Area Under The Curves Differential Equations Application of Derivatives Indefinite Integration Definite Integration
EXAM MAP

Browse past year questions by exam & subject

Joint Entrance Examination
JEE Main JEE Advanced MHT CET BITSAT COMEDK WB JEE KCET VITEEE AP EAPCET TS EAMCET IAT (IISER)
Medical
NEET AIIMS MHT CET (Biology)
Graduate Aptitude Test in Engineering
GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN GATE Data Science and Artificial Intelligence
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12