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

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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]

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Important Questions on Electric Charges and Fields

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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}}

]

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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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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

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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

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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.

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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.5>Q 28

A charge

q

is placed at a point exactly above the centre of square (of side

a

) at a distance

\frac{a}{2}

. The flux passing through square will be

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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.5>Q 29

The electric field due to an infinitely long, straight line of charge with uniform charge density

λ

points straight away from the line and has magnitude

E = λ / (2 π ε_{0} r)

, where

r

is the distance from the wire. Calculate the flux of this electric field through a right cylinder of height

h

and radius

R

, co-axial with the charged line. Repeat the calculation for a cylinder of radius

2 R

.

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Gamma Question Bank for Engineering Physics>Chapter 15 - Electric Charges and Fields>EXERCISE 1.6>Q 30

How much charge is contained in the pillbox?