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

MEDIUM

NEET

IMPORTANT

Earn 100

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 $L$ is $1.7 Ω,$ the current in the loop at that instant will be close to:

1.64% studentsanswered this correctly

Important Questions on Electromagnetic Induction and Alternating Currents

EASY

NEET

IMPORTANT

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

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 8

An AC of

50 Hz

and

1 A

peak value flows in a transformer whose mutual inductance is

1.5 H

. The induced emf in the secondary is,

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 9

In the circuit shown here, the point '

C

' is kept connected to point

A

'' till the current flowing through the circuit becomes constant. Afterward, suddenly, point '

C

' is disconnected from point

A

'' and connected to point '

B

' at time

t = 0

. Ratio of the voltage across resistance and the inductor at

t = \frac{L}{R}

will be equal to :

Question Image

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 10

An emf of

20 V

is applied at time

t = 0

to a circuit containing in series

10 m H

inductor and

5 Ω

resistor. The ratio of the currents at time

t = \infty

and at

t = 40 s

is close to: (Take

e^{2} = 7.389

)

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 11

A series

L - R

circuit is connected to a battery of emf

V

. If the circuit is switched on at

t = 0

, then the time at which the energy stored in the inductor reaches

(\frac{1}{n})

times of its maximum value, is :

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 12

A coil of

40 H

inductance is connected in series with a resistance of

8 Ω

and the combination is joined to the terminals of a

2 V

battery. The time constant of the circuit is,

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 13

Which of the following remain constant in a transformer ?

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 3>Q 14

A coil having an inductance of

\frac{1}{π} henry

is connected in series with a resistance of

300 Ω

. If

20 volts

from a

200

cycle source is impressed across the combination, the value of the phase angle between the voltage and the current is,

Important Questions on Electromagnetic Induction and Alternating Currents

Learn and Prepare for any exam you want !