Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 8

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The electric field $(E)$ due to infinite charged sheet varies as distance $' r'$ is given by

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Important Questions on Electric Charges and Fields

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 9

When an electric dipole having dipole moment

\vec{p}

is placed in an uniform electric field

\vec{E}

, the torque

\vec{τ}

acting on the dipole is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 10

In the following figure, if magnitude of force between $B$ and $C$ is $F$ , then magnitude of force between $A$ and $B$ is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 11

The S.I. unit of electric field intensity is Newtons per _____.

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 12

Six equal positive point charges

q

each, are placed at the corners of a regular hexagon of side a. The electric field intensity at the centre of the hexagon is_____.

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 13

The electric field _____ due to point charge

Q

varies with distance

r

as

E \propto \frac{1}{r^{2}}

.

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 14

A point charge

q

is placed at the centre of a cube. Electric _____ linked with each face of the cube is

\frac{q}{6 ε_{0}}

.

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 15

An electric dipole of dipole moment

2 \times 10^{- 8} Cm

is placed in a uniform external electric field of

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

. The maximum torque on the dipole is_____

\times 10^{- 3} N m

.

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>Assignment>Q 16

An electrostatic field line cannot be discontinuous. Why ?