Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 33

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Assertion : Electric field inside a current carrying wire is zero.

Reason : Net charge in a current carrying wire is non zero.

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Important Questions on Electrostatics

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 34

Three parallel metallic plates, each area $A$ are kept as shown in the figure and charges $Q_{1}$ , $Q_{2}$ and $Q_{3}$ are given to them. Edge effects are negligible. Calculate the charges on the two outermost surfaces $a$ and $f$ .

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 35

A point charge

' q'

is placed at a point inside a hollow conducting sphere. Which of the following electric force pattern is correct?

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 36

An electric dipole of moment

\vec{p} = (- \hat{i} - 3 \hat{j} + 2 \hat{k}) \times 10^{- 29} C m

at the origin

(0, 0, 0)

. The electric field due to this dipole at

\vec{r} = + \hat{i} + 3 \hat{j} + 5 \hat{k}

(note that

\vec{r} \cdot \vec{p} = 0

) is parallel to:

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 37

An electric dipole is kept in a uniform electric field with its axis inclined at some angle to the electric field. It experiences

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 38

An electric dipole of length

5 cm

is placed in an uniform electric field of

5 \times 10^{5} N C^{- 1}

at an angle of

30 °

with the charges

+ 10 mC

and

- 10 mC

on the dipole. The dipole experiences a torque of

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 39

On the axis and on the equator of an electric dipole for all points ______

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 40

The net electric charge enclosed by a Gaussian surface of dipole is

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Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 2>Q 41

An electric dipole having point charges $+ q$ and $- q$ , separated by a fixed distance $d$ is kept under the influence of a uniform electric field $E$ , such that the axis of the dipole is making an angle $θ = 45 °$ with the direction of $E$ , as shown in the figure. If the electric dipole is allowed to rotate in the $x y$ -plane with its center being stationary, what is the magnitude of the net torque acting on the electric dipole?