NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 6

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IMPORTANT

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Electric field intensity $E$ at a point $P$ (see figure) at a perpendicular distance $r$ from an infinitely long linear charge $X - X$ having linear charge density $λ$ is given by :

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Important Questions on Gauss' Theorem

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12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 7

A closed surface in vacuum encloses charges

- q

and

+ 3 q .

The total electric flux emerging out of the surface is :

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 1

What is the use of Gaussian surface?

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NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 2

A Gaussian surface is chosen to obtain an expression for the electric field at a point due to a given charge configuration. It is a closed surface. State one essential property of such a chosen Gaussian surface.

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NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 3

How do the expressions for electric fields just outside a sheet of charge and a charged conductor differ?

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NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 4

The unit of electrostatic field E is volt/metre. Obtain the unit of electric flux.

EASY

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 5

A sphere

S_{1}

, encloses a charge

q

. There is a larger concentric sphere

S_{2}

with no additional charge between

S_{1}

and

S_{2}

. Find the ratio of electric flux through

S_{1}

and

S_{2}

.

EASY

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 6

A large hollow metallic sphere has a positive charge of

35.4 μC

, at its centre. Find how much electric flux emanates from the sphere.

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 2 - Gauss' Theorem>QUESTIONS>Q 7

If Coulomb’s law involved

1 / r^{3}

, dependence (instead of

1 / r^{2}

), would Gauss’ law still valid?