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

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An electric dipole placed in a uniform electric field experiences, in general

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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>EXERCISE>Q 17

An electric dipole consists of two opposite charges each of magnitude

2 μ C

separated by a distance

1 cm

. The dipole is placed in an external field of

10^{3} N C^{- 1}

. The maximum torque on the dipole is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 18

A point

B

lies on the perpendicular bisector of an electric dipole of dipole moment

\vec{p}

. The distance of $B$ from the dipole is

r

(

r

is much larger than the size of the dipole). The electric intensity at

B

is proportional to

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 19

Which of the following statements is incorrect regarding the electric lines of forces?

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 20

The electric field due to a point charge at a distance

6 m

from it is

630 N C^{- 1}

. The magnitude of the charge is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 21

The net flux passing through a closed surface enclosing unit charge is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 22

A uniformly charged conducting sphere is having radius

1 m

and surface charge density

20 C m^{- 2}

. The total flux leaving the Gaussian surface enclosing the sphere is

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 23

$S_{1}, S_{2}, S_{3}$ are three concentric spherical shells, as shown in figure. $S_{1}$ and $S_{2}$ have charge $4 Q$ and $8 Q$ respectively, whereas $S_{3}$ is uncharged. Find the ratio of the flux passing through $S_{1}$ to that through $S_{3}$

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Gamma Question Bank for Medical Physics>Chapter 16 - Electric Charges and Fields>EXERCISE>Q 29

If

r

is distance measured from centre of a charged shell and

R

is its radius, then the graph which may correctly represent variation of electric field

(E)

is