Assertion (A): It is more difficult to move a magnet into a coil with more loops Reason (R): This is because emf induced in each current loop resists the motion of the magnet

Both A and R are true and R is a correct explanation for A

Both A and R are true but R is not a correct explanation for A

EASY

AP EAPCET

IMPORTANT

Earn 100

Assertion (A): When plane of coil is perpendicular to magnetic field, magnetic flux linked with the coil is minimum, but induced $e m f$ is zero
Reason $(R) : ϕ = n A B \cos θ$ and $e = \frac{d ϕ}{d t}$

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Important Questions on Electromagnetic Induction and Alternating Current

EASY

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET - 20 Aug 2021 Afternoon>Q 7

Assertion (A): Magnetic flux is a vector quantity.
Reason (R): Value of magnetic flux can be positive negative or zero.

EASY

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET 2021 (19-Aug Forenoon)>Q 10

Two inductors

A

and

B

when connected in parallel are equivalent to a single inductor of inductance

1.5 H

, and when connected in series are equivalent to a single inductor of inductance

8 H

. Find the difference in the inductances of

A

and

B

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET 2021 (19-Aug Afternoon)>Q 11

A solenoid of length

60 cm

with

15

turns per

cm

and area of cross section

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

completely surrounds another co-axial solenoid of same length and area of cross-section

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

with

40

turns per

cm

. Mutual inductance of the system is

MEDIUM

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET - 20 Aug 2021 Forenoon>Q 12

20 V

AC is applied to a circuit consisting of a resistor and a coil with negligible resistance. If the voltage across the resistor is

12 V

, the voltage across the coil is

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET 2020 (Sep-23 Shift-1)>Q 13

In an AC circuit, the current flowing is

I = 5 \sin (100 t - \frac{π}{2}) A

and the potential difference is

e = 200 \sin (100 t)

. The power consumption is equal to

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET 2019 (21-Apr Shift-2)>Q 14

An emf of

15 V

is applied to a circuit containing

5 H

inductance and

10 Ω

resistance. The ratio of currents at time

t = \infty

and

t = 1

s after closing the switch is:

EASY

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET 2021 (19-Aug Forenoon)>Q 16

An electric generator is based on_____

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Electromagnetic Induction and Alternating Current>AP EAPCET - 20 Aug 2021 Afternoon>Q 17

An AC generator consists of a coil of

100

turns and is of cross-sectional area

3 m^{2}

. It is rotating at a constant angular speed of

60 rad s^{- 1}

in a uniform magnetic field of

0.04 T

. Resistance of the coil is

360 Ω

. What is the maximum power dissipation in the coil?

Assertion (A): When plane of coil is perpendicular to magnetic field, magnetic flux linked with the coil is minimum, but induced emf is zero Reason (R):ϕ=nABcosθ and e=dϕdt

Important Questions on Electromagnetic Induction and Alternating Current

Learn and Prepare for any exam you want !

Assertion (A): When plane of coil is perpendicular to magnetic field, magnetic flux linked with the coil is minimum, but induced $e m f$ is zero
Reason $(R) : ϕ = n A B \cos θ$ and $e = \frac{d ϕ}{d t}$