A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 15

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An electric dipole of moment $p$ is placed in the position of stable equilibrium in a uniform electric field of intensity $E$ . The torque required to rotate, when the dipole makes an angle $θ$ with the initial position is -

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

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 16

If a charge is moved against the coulomb force of an electric field -

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 17

Torque acting on electric dipole of dipole moment

\vec{p}

placed in uniform electric field

E

is -

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 18

The work done in carrying a charge

Q

once round the circle of radius

r

with charge

Q

at the centre of the circle is -

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 19

In the electric field of a point charge $q$ , a certain charge is carried from $A$ to $B, C, D, E$ in Fig. $2.111$ . Then the work done

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 20

A dipole of electric dipole moment

\vec{p}

is placed in a uniform electric field of strength

\vec{E}

. If

θ

is angle between

\vec{p}

and

\vec{E},

then potential energy of the dipole becomes largest, when

θ

is -

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 21

In the electric field of a point charge

q

shown in the figure given below, a charge is carried from

A

to

B

and from

A

to

C

. Compare the work done -

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 22

Three charges

4 q

,

Q

and

q

are placed in a straight line of

0, \frac{l}{2}

and

l

respectively. What should be

Q

at length

l

at points in order to make the net force on

q

to be zero ?

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 23

An electric dipole placed in non-uniform electric field experiences -