1

WB JEE 2021

MCQ (Single Correct Answer)

+1

-0.25

A metal sphere of radius R carrying charge q is surrounded by a thick concentric metal shell of inner and outer radii a and b, respectively. The net charge on the shell is zero. The potential at the centre of the sphere, when the outer surface of the shell is grounded will be

2

WB JEE 2021

MCQ (Single Correct Answer)

+1

-0.25

Three infinite plane sheets carrying uniform charge densities $$-$$ $$\sigma$$, 2$$\sigma$$, 4$$\sigma$$ are placed parallel to XZ-plane at Y = a, 3a, 4a respectively. The electric field at the point (0, 2a, 0) is

3

WB JEE 2021

MCQ (Single Correct Answer)

+1

-0.25

Two point charges +q

_{1}and +q_{2}are placed a finite distance d apart. It is desired to put a third charge q_{3}in between these two charges, so that q_{3}is in equilibrium. This is4

WB JEE 2020

MCQ (Single Correct Answer)

+1

-0.25

As shown in the figure, a point charge q

In that case, which of the following graph(s) shows most correctly the electric field vector in E

_{1}= + 1 $$ \times $$ 10^{-6}C is placed at the origin in xy-plane and another point charge q_{2}= + 3 $$ \times $$ 10^{-6}C is placed at the coordinate (10, 0).In that case, which of the following graph(s) shows most correctly the electric field vector in E

_{x}in x-direction?Questions Asked from Electrostatics (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