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In a region of space, magnetic field exists in a cylindrical region of radius a centred at origin with magnetic field along negative $z$ -direction. The field is given by $\vec{B} = - B_{0} t \hat{k} .$ The force experienced by a stationary charge $q$ placed at $(r, 0, 0),$ where $r > a,$ is

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Important Questions on Electromagnetic Induction

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 15

A conducting rod of length

L

slides at a constant velocity

V

on two parallel conducting rails as shown in figure. The mechanical power required to pull the rod at constant velocity is

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 16

A semicircle conducting ring of radius $R$ is placed in $X Y$ plane as shown in figure. A uniform magnetic field exist along $x$ -axis. No emf will be induced, if

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 17

A uniform circular ring of radius

R,

mass

m

has uniformly distributed charge

q .

The ring is constrained to rotate about its own axis (which is vertical) without friction. In the space a uniform magnetic field

B,

directed vertically down ward exists in a cylindrical region. The cylindrical region is co-axial with

B

and has a radius greater than

R .

B

increases at a constant rate,

\frac{d B}{d t} = α,

angular acceleration of the ring will

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 18

A circular conducting ring is rotated about one its diameter in a magnetic field

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 19

Figure shows two circular rings of radii

a & b (a > b)

joined together by wire of negligible resistance. If the arrangement is placed in a time varying magnetic field,

\frac{d B}{d t} = k

and if the resistance per unit length of wire is

λ,

then induced current is

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 21

Figure shows part of a circuit. If

I = 5 A

and is decreasing at a constant rate of

10^{3} A / s

then

V_{B} - V_{A}

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 22

Two different coils have self inductances

L_{1} = 8 mH

and

L_{2} = 2 mH .

The current in both the coil is increased at same constant rate. At a certain instant power given to two coils is same. At that time the energy stored in both the coils are

V_{1} & V_{2}

respectively, then

\frac{V_{1}}{V_{2}}

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment Set-2>Q 24

In the arrangement shown, what is the expression for emf induced in the smaller loop of radius

r ?

The current

I

varies as

I = 3 t + 5 (R > > r)

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In a region of space, magnetic field exists in a cylindrical region of radius a centred at origin with magnetic field along negative z-direction. The field is given by B→=-B0tk^. The force experienced by a stationary charge q placed at (r, 0, 0), where r>a, is

Important Questions on Electromagnetic Induction

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In a region of space, magnetic field exists in a cylindrical region of radius a centred at origin with magnetic field along negative $z$ -direction. The field is given by $\vec{B} = - B_{0} t \hat{k} .$ The force experienced by a stationary charge $q$ placed at $(r, 0, 0),$ where $r > a,$ is