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Flux $(ϕ)$ in a closed conducting loop of resistance $10 Ω$ varies with time $(t)$ as $ϕ = 2 t^{2} + 3 t + 1 Wb,$ where $t$ is in seconds. The charge flown (in C) through a cross-section between $t = 0$ to $t = 2 s$ 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>Q 55

A semicircular wire of radius $R$ is moving in a magnetic field $B$ as shown in the figure. The emf (in $V$ ) induced across the wire is
(Given $B R V = 8$ volt)

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment>Q 1

A square loop of side $a$ has resistance $R$ and lies at distance $a$ from an infinite straight wire carrying $I_{0} .$ Find the charge flown through the loop when the loop has turned through an angle of $120$ about an axis $A B$ as shown.

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

A conductor of length

l

is placed perpendicular to a horizontal uniform magnetic field

B .

Suddenly a certain amount of charge is passed through it, when it is found to jump to a height

h .

The amount of charge that passes through the conductor is :

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment>Q 3

In a square loop of side length

' a',

current

I_{0}

is flowing as shown. Magnetic flux associated with region

x > 0

x y

plane is

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment>Q 4

A rectangular loop of width

b = (e - 1) a,

length I, mass

m

and resistance

R

is placed closed to and coplanar with a very long fixed straight conductor carrying

I_{0} .

The current in the conductor is suddenly switched off. Velocity of loop after current is switched off, is

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment>Q 5

In the given

L R

circuit, switch

S

is closed at

t = 0 .

The energy stored in the magnetic field, at time

t_{0} = \frac{3 L}{2 R} \ln 2

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment>Q 6

Two points

B

and

C

are such that length of

A B

and

B C

l_{1}

and

l_{2}

respectively are placed inside an infinite solenoid as shown in figure. The current through solenoid is varying with time. Line

A B

and

B C

are in plane perpendicular to solenoid axis. If strength of induced electric field at

B

and

C

are same then value of

θ,

is
(Given :

l_{1} + l_{2} <

radius of solenoid. And Point

A

is centre of the cross-sectional area).

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Gamma Question Bank for Engineering Physics>Chapter 20 - Electromagnetic Induction>Assignment>Q 8

A rectangular coil is being rotated about an axis as shown. A long current carrying wire is along the axis of rotation. Then the induced emf in this coil will be

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Flux (ϕ) in a closed conducting loop of resistance 10Ω varies with time (t) as ϕ=2t2+3t+1 Wb, where t is in seconds. The charge flown (in C) through a cross-section between t=0 to t=2 s is _____

Important Questions on Electromagnetic Induction

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Flux $(ϕ)$ in a closed conducting loop of resistance $10 Ω$ varies with time $(t)$ as $ϕ = 2 t^{2} + 3 t + 1 Wb,$ where $t$ is in seconds. The charge flown (in C) through a cross-section between $t = 0$ to $t = 2 s$ is _____