Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 13

MEDIUM

JEE Main/Advance

IMPORTANT

Earn 100

A wire is bent in the form of a regular pentagon of edge length $a$ . A total of charge $q$ is distributed over it. Find the electric field at the centre of the pentagon.

Important Questions on Electric Charges and Fields

HARD

JEE Main/Advance

IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 14

A point charge

q

is kept at the centre of a fixed semicircular thread having a uniform charge per unit length

λ

, the radius of the semicircular thread being

R

. The force required to keep the charge stationary is

EASY

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 15

In which of the following figures, the direction of electric field at point

P

is different from others?

(λ

and

- λ

represent constant linear charge densities)

EASY

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 16

A circular ring carries a charge

Q

, the variation of electric field with distance

x

measured from centre along axis for

x < < R

can be given as

[R \to

Radius of Ring]

EASY

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.3>Q 17

A circular ring carries a charge

Q

, the variation of electric field with distance

x

measured from centre along axis for

x < < R

is given by

E = \frac{k Q x}{R^{3}}

[R \to

Radius of Ring]. The maximum electric field on the axis will be [where

C = \frac{Q}{4 π ε_{0} R^{2}}

]

MEDIUM

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.4>Q 20

Which one of the following is correct regarding order of electric field intensity?
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EASY

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.4>Q 21

A hemispherical surface of radius $R$ is located in a uniform electric field $E$ , as shown. The flux of electric field through the surface is

Question Image

EASY

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.4>Q 22

A cylinder of height $H$ ' and radius of cross-section $r$ ' is kept in uniform electric field $\vec{E}$ as shown in figure. The magnitude of flux that enters from left half of cylinder is

Question Image

EASY

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.5>Q 23

Charge

q

is placed at the center of a cube of side

l

. Find electric flux through each of six faces.