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Important Questions: 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 for JEE

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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:

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Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Electrostatics are high-weightage?

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