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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 24

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A two point charges $4 q$ and $- q$ are fixed on the $x$ -axis at $x = \frac{- d}{2}$ and $x = \frac{d}{2}$ , respectively. If the third point charge ‘ $q$ ’ is taken from the origin to $x = d$ along the semicircle as shown in the figure, the energy of the charge will:

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Important Questions on Electrostatics

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 25

A point charge

q

is rotated along a circle in the electric field generated by another point charge

Q

. The work done by the electric field on the rotating charge in one complete revolution is

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 26

The excess of pressure, due to surface tension, on a spherical liquid drop of radius

R

is proportional to

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 27

A positive charge

q

is placed at the centre of a neutral hollow cylindrical conducting shell with its cross section as shown in the figure below.

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Which one of the following figures correctly indicates the induced charge distribution in the conductor (ignore edge effects).

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 28

For the hollow thin cylinderical current carrying pipe which statement is correct :-

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 29

Two identical electric point dipoles have dipole have dipole moments

{\vec{p}}_{1} = p \hat{i}

and

{\vec{p}}_{2} = - p \hat{i}

and are held on the

x

-axis at distance '

a

' from each other. When released, they move along the

x

-axis with the direction of their dipole moments remaining unchanged. If the mass of each dipole is '

m

', their speed when they are infinitely far apart is :

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 30

An electric dipole consists of two opposite charges, each of magnitude

1.0 μC

separated by a distance of

2.0 cm .

The dipole is placed in an external field of

10^{5} {NC}^{- 1}

The maximum torque on the dipole is

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 31

Shown in the figure are two point charges

+ Q

and

- Q

inside the cavity of a spherical shell. The charges are kept near the surface of the cavity on opposite sides of the centre of the shell. If

σ_{1}

is the surface charge on the inner surface and

Q_{1}

net charge on it and

σ_{2}

the surface charge on the outer surface and

Q_{2}

net charge on it then:

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 3>Q 32

Arrangement of charges are shown in the figure. Flux linked with the closed surface $P$ and $Q$ respectively are ________ and ________ .

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A two point charges 4q and –q are fixed on the x -axis at x=−d2 and x=d2, respectively. If the third point charge ‘q ’ is taken from the origin to x=d along the semicircle as shown in the figure, the energy of the charge will:

Important Questions on Electrostatics

Learn and Prepare for any exam you want !

A two point charges $4 q$ and $- q$ are fixed on the $x$ -axis at $x = \frac{- d}{2}$ and $x = \frac{d}{2}$ , respectively. If the third point charge ‘ $q$ ’ is taken from the origin to $x = d$ along the semicircle as shown in the figure, the energy of the charge will: