Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 31

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The coefficient of self induction of two inductor coils are $20 mH$ and $40 mH$ respectively. If the coils are connected in series so as to support each other and the resultant inductance is $80 mH$ then the value of mutual inductance between the coils will be

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Important Questions on Electromagnetic Induction

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 32

A coil having number of turns

N

and area

A

is rotated in a uniform magnetic field with angular velocity

ω

. The maximum induced emf in it is given by

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 33

The number of turns in the coil of an AC generator is

5000

and the area of the coil is

0.25

m^{2}

. The coil is rotated at the rate of

100

cycles/s in a magnetic field of

0.2

Wb /

m^{2}

. The peak value of the emf generated is nearly,

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 1

A uniform magnetic field exists in space as

\vec{B} = 4 \hat{i} T .

The magnetic flux through an area

\vec{S} = (2 \hat{i} + 4 \hat{j}) m^{2}

is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 2

Magnetic flux (in

Wb

) linked with a closed loop varies with time

t

(in

s

) as

ϕ = 2 t^{2} + 1 .

The magnitude of induced emf at

t = 1 s

is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 3

A copper rod of length

2 m

moves in a transverse uniform magnetic field of

3 T .

It is moving with constant velocity of

2 m s^{- 1}

in a direction perpendicular to its length. The induced emf across its ends is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 4

A metallic rod of length

l

is hinged at one end. If it is rotated with angular velocity

ω

in a plane perpendicular to uniform magnetic field

B

, then emf induced across its ends is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 5

A rectangular metal loop $A B C D$ is moving in uniform transverse magnetic field $(B)$ with constant velocity $(v) .$ The induced emf in the loop is

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Gamma Question Bank for Medical Physics>Chapter 21 - Electromagnetic Induction>Assignment Set-2>Q 6

Change in magnetic flux linked with a coil is

6 Wb .

If resistance of the coil is

2 Ω

, then charge flown through the wire is