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12th West Bengal Board

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Point charge $q$ moves from point $P$ to point $S$ along the path $P Q R S$ (as shown in figure, Fig. $2.115$ ) in a uniform electric field $E$ pointing co-parallel to the positive direction of $X$ -axis. The coordinates of the points $P, Q, R$ and $S$ are $(a, b, 0), (2 a, 0, 0), (a, - b, 0)$ and $(0, 0, 0)$ respectively. The work done by the field in the above process is given by the expression

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Important Questions on Interaction of Charged Particles, Electric Field and Potential

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12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 36

A positively charged thin metal ring of radius

R

is fixed in the

x y

place with its centre at the origin

O

. A negatively charged particle

P

is released from rest at the point

(0, 0, z_{0})

where

z_{0} > 0

. Then the motion of

p

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 37

A charge

q

is placed at the centre of the line joining two equal positive charges

Q

. The system of the three charges will be in equilibrium, if

q

is equal to -

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 38

A uniform electric field pointing in positive

X

direction exists in a region. Let

A

be the origin,

B

be the point on the

X

-axis at

x = + 1 cm

and

C

be the point on the

Y

-axis at

y = + 1 cm

. Then the potentials at

A, B

and

C

satisfy-

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 39

Potential at any point inside a charged hollow sphere -

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12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 40

A charge

+ q

is fixed at each of the point

x = x_{0}, x = 3 x_{0}, x = 5 x_{0} \dots \dots \dots

\propto

on the

X

-axis and a charge

- q

is fixed at each of the points of the points

x = 2 x_{0}, x = 4 x_{0}, x = 6 x_{0} \dots \dots \dots .

\propto

, Here

x_{0}

is a positive constant. Take the electric potential at a point due to a charge

Q

at a distance

r

from it to be

\frac{1}{4 π ε_{0}} \frac{Q}{r} .

Then, the potential at the origin due to the above system of the charges is -

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 41

Two equal negative charges

- q

are fixed at the points

(0, a)

and

(0, - a)

on the

Y

-axis. A positive charge

Q

is released from rest at the point

(2 a, 0)

on the

X

-axis. The charge

Q

will-

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 42

A hollow sphere of charge does not produce an electric field at any -

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 43

Three positive charges of equal value

q

are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in Fig.

2.116

Important Questions on Interaction of Charged Particles, Electric Field and Potential

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