NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 19

EASY

12th ICSE

IMPORTANT

Earn 100

A player whose height is $2.0 m$ runs towards east with a speed of $20 km h^{- 1}$ . How much potential difference will be induced between his head and feet? Horizontal component of earth’s magnetic field, $Bh = 4.0 \times 10^{- 5} Wb m^{- 2}$ . If he runs towards north, then discus about emf induced.

Important Questions on Electromagnetic Induction

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 20

A solenoid has

2000

turns wound over a length of

0.3 m

. The area of cross-section is

1.2 \times 10^{- 3} m^{2}

. Around its central section a coil of

300

turns is closely wound. If an initial current of

2 A

is reversed in

0.25 s

, find the emf induced in the coil.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 21

A magnetic flux of

5 μWb

is linked with a coil when a current of

1 mA

flows through it. Calculate self-inductance of the coil.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 22

If a rate of change of current of

2 {As}^{- 1}

induces an emf of

10 mV

in a solenoid, what is the self-inductance of the solenoid?

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 23

The current in a coil increases from zero to

2 A

in

0.05 s

, due to which an induced emf of

80 V

is developed. Calculate the coefficient of self-induction of the coil.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 24

The self-inductance of a coil is

10 H

. Find the rate of change of current in the coil, if an induced emf of

120 V

is developed in it.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 25

A coil has a self-inductance of

0.05

henry. Find magnitude of the emf induced in it when the current flowing through it is changing at the rate

100 {As}^{- 1}

.

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 26

A coil has an inductance of

4.0 H

. Find the emf induced, if a current of

2.7 A

in it is stopped within

1 - 35 s

.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 11 - Electromagnetic Induction>QUESTIONS>Q 27

If the current in the primary coil of a transformer is reduced from

0.5 A

to zero in

1 ms

, an emf of

500 V

is induced across the secondary. Calculate the coefficient of mutual induction

M

.