Physics · JEE

Electric field: electric field due to a point charge, electric field lines, electric dipole, electric field due to a dipole, torque on a dipole in a uniform electric field Mock Test for JEE

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Syllabus context

Part of Electrostatics in JEE Main Physics.

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Q1PhysicsUnit 11: Electrostatics

We cannot see anything in a dark room because:

Q2PhysicsUnit 11: Electrostatics

A thick shell with inner radius

R

and outer radius

3 R

has a uniform charge density

\sigma c / m^{3} .

It has a spherical cavity of radius

R

as shown in the figure. the electric field at the centre of the cavity is

Q3PhysicsUnit 11: Electrostatics

An electric dipole is placed in a non uniform electric field increasing along the

+

ve direction of

\mathrm{X}

- axis. The dipole moves along and rotates

Q4PhysicsUnit 11: Electrostatics

A ball of radius R carries a positive charge whose volume charge density depends only on the distance r from the ball's centre as:

\rho=\rho_{0}\left(1-\frac{r}{R}\right)

where

\rho_{0}

is constant. Assume

\epsilon

as the permittivity of the ball. Then the magnitude of the electric field as a function of the distance r outside the ball is given by :

Q5PhysicsUnit 11: Electrostatics

A free electron in an electric field

Q6PhysicsUnit 11: Electrostatics

Electric intensity due to an electric dipole varies with distance

r

E \alpha r^{n},

where 'n" is

Q7PhysicsUnit 11: Electrostatics

There exists a non-uniform electric field along

x

-axis as shown in the figure below. The field increases at a uniform rate along +ve x-axis. A dipole is placed inside the field as shown.Which one of the following is correct for the dipole?

Q8PhysicsUnit 11: Electrostatics

A red LED emits light at

0.1 W

uniformly around it. The amplitude of the electric filed of the light at a distance of

1 ~ m

form the diode is:

Q9PhysicsUnit 11: Electrostatics

The acceleration of a charged particle in a uniform electric field is : (where specific charge of a particle

\left.=\frac{q}{m}\right)

Q10PhysicsUnit 11: Electrostatics

Assertion Three equal charges are situated on a circle of radius r such that they form on equilateral triangle, then the electric field intensity at the centre is zero Reason The force on unit positive charge at the centre, due to the three equal charges are represented by the three sides of a triangle taken in the same order Therefore, electric field intensity at centre is zero

Q11PhysicsUnit 11: Electrostatics

An electric dipole placed with its axis in the direction of a uniform electric field experiences:

Q12PhysicsUnit 11: Electrostatics

Why are lightning conductors pointed in shape?

Q13PhysicsUnit 11: Electrostatics

A point charge is brought in an electric field. The electric field at a nearby point: This question has multiple correct options

Q14PhysicsUnit 11: Electrostatics

Charge

2 Q

and

-Q

are placed as shown in figure. The point at which electric field intensity is zero will be somewhere:

Q15PhysicsUnit 11: Electrostatics

The intensity of the atmospheric electric field is, normally,

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How long should a Electric field: electric field due to a point charge, electric field lines, electric dipole, electric field due to a dipole, torque on a dipole in a uniform electric field mock test take?

For a topic-level test, aim for 20–30 minutes. For a full subject mock, allow 60–90 minutes to mirror JEE timing.

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Aim for 70%+ accuracy initially, then push toward 85%+ as your exam date approaches. Review explanations for every wrong answer.

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