The figure shows an LCR network connected to a 300 V A C supply. The circuit elements are such that R = X L = X C = 10 Ω . Three voltmeters V 1 , V 2 and V 3 are connected as shown. Which of the following represents the correct set of readings of the voltmeters?

V 1 = 300 V , V 2 = 300 V , V 3 = 300 V

V 1 = 100 V , V 2 = 100 V , V 3 = 100 V

V 1 = 250 V , V 2 = 0 V , V 3 = 150 V

V 1 = 300 V , V 2 = 100 V , V 3 = 100 V

An electric generator is based on_____

Faraday's laws of electromagnetic induction

Motion of charged particles in an electromagnetic field

Fission of Uranium by slow neutrons

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A choke coil is needed to operate an arc lamp at $250 V (rms)$ and $50 Hz$ . The lamp has an effective resistance of $15 Ω$ when running at $10 A (rms)$ . The inductance of the choke coil is:

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Important Questions on Electromagnetic Induction and Alternating Currents

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 2>Q 46

In an

L - C - R

series circuit

R = \sqrt{5} Ω, X_{L} = 9 Ω

and

X_{C} = 7 Ω

. If applied voltage in the circuit is

50 volt

then impedance of the circuit in

ohm

will be

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 1

The figure represents an area $A = 0.5 m^{2}$ situated in a uniform magnetic field $B = 2.0 weber m^{- 2}$ and making an angle of $60 °$ with respect to the magnetic field. The value of the magnetic flux through the area would be equal to

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 2

A rectangular loop is being pulled at a constant speed $v$ through a region of certain thickness $d$ , in which a uniform magnetic field $B$ is set up.

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The graph between position $x$ of the right hand edge of the loop and the induced emf $E$ will be,

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 3

A copper disc of radius

0.1 m

is rotated about its centre with

10

revolutions per second in a uniform magnetic field of

0.1 tesla

with its plane perpendicular to the field. The emf induced across the radius of disc is

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 4

The dimension of the ratio of magnetic flux and the resistance is equal to that of

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 5

A coil of cross-sectional area

A

having

n

turns is placed in a uniform magnetic field

B

. When it is rotated with an angular velocity

ω,

the maximum e.m.f. induced in the coil will be:

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 6

The figure shows a square loop

L

of side

5 c m

which is connected to a network of resistances. The whole setup is moving towards the right with a constant speed of

1 c m s^{- 1}

. At some instant, a part of

L

is in a uniform magnetic field of

1 T

perpendicular to the plane of the loop. If the resistance of

L

1.7 Ω,

the current in the loop at that instant will be close to:
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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 7

A solid metal cube of edge length

2 cm

is moving in the positive

y

-direction, at a constant speed of

6 m s^{- 1}

. There is a uniform magnetic field of

0 .1 T

in the positive

z

-direction. The potential difference between the two faces of the cube, perpendicular to the

x

-axis, is

A choke coil is needed to operate an arc lamp at 250 V rms and 50 Hz. The lamp has an effective resistance of 15 Ω when running at 10 A rms. The inductance of the choke coil is:

Important Questions on Electromagnetic Induction and Alternating Currents

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A choke coil is needed to operate an arc lamp at $250 V (rms)$ and $50 Hz$ . The lamp has an effective resistance of $15 Ω$ when running at $10 A (rms)$ . The inductance of the choke coil is: