Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 125

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IMPORTANT

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Assertion: Electric field due to a charged long conducting sheet does not depend on position of point from sheet.

Reason: Charged conducting sheet have uniform linear charge density.

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Important Questions on Electric Charges and Fields

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 126

Assertion: The net force acting on charge q placed at the centre of the metallic shell will be zero.

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Reason: Electric field inside the shell due to all the charges present outside the metallic shell is always zero.

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 127

A hollow charged metal sphere has radius

r

. If the potential difference between its surface and a point at a distance

3 r

from the centre is

V

, then electric field intensity at a distance

3 r

is:

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 128

A positive point charge is placed at

P

, in front of an earthed metal sheet

S

.

Q

and

R

are two points between

P

and

S

, as shown in the figure. If the electric field strength at

Q

and

R

are, respectively,

E_{Q}

and

E_{R}

and the potential at

Q

and

R

are, respectively,

V_{Q}

and

V_{R}

. Then,

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 129

For two infinitely charged parallel sheets, the electric field at

P

will be

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 130

Charge

+ q

on a small conducting sphere

S_{1}

is placed inside a large hollow metallic sphere

S_{2}

having a charge

+ Q

as shown in the figure. The sphere

S_{1}

is then connected to

S_{2}

by a conducting wire. The charge on

S_{1}

will be

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 131

An infinite line charge produces a field of

9 \times 10^{4} N C^{- 1}

at a distance of 2 cm. the linear density is

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 132

Three infinitely long charge sheets are placed as shown in figure. The electric field at point

P

is

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IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 133

An infinite line charge produces a field of

7.182 \times 10^{8} N C^{- 1}

at a distance of

2 cm

. The linear charge density is