ALTERNATING CURRENT

ALTERNATING CURRENT

12th Grade

20 Qs

quiz-placeholder

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Topic 6(i): Alternating Current

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ALTERNATING CURRENT

ALTERNATING CURRENT

Assessment

Quiz

Professional Development, Physics

12th Grade

Hard

Created by

SANJAY NEMA

Used 18+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The induced emf in a closed coil of wire, according to Faraday’s Law, is proportional to:

I. The magnitude of the magnetic flux

II. The magnetic flux density

III. The number of turns

IV. The rate of change of magnetic flux

I

II

II and III (

III and IV

IV

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

A changing magnetic field B induces an emf Ɛ in a coil of radius R, as shown figure. What is the induced emf in the coil of radius 2R?

Ɛ

2 Ɛ

4 Ɛ

Ɛ/2

Ɛ/4

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

A uniform magnetic field is distributed in the space of a circle of radius r, as shown in figure. The changing field induces an emf Ɛ in the loop with radius r. What is the induced emf in the loop with radius 2r?

Ɛ

2 Ɛ

4 Ɛ

Ɛ/2

Ɛ/4

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The number of turns in a long solenoid is doubled; how does the inductance of the solenoid change?

It doesn’t change

It doubles

It quadruples

It is cut to a half

It is cut to a quarter

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is true about an inductor?

I. It stores energy

after the current stops flowing

II. It opposes the

change of current

III. It can produce a

magnetic field

I

III

I and II

II and III

All of the above

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following can act as an inductor?

I. A long coil

II. A long wire

III. A conducting sphere

I

III

I and II

II and III

All of the above

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

At time t = 0, the switch is closed. Which of the following graphs best describes the voltage V across the resistance R as a function of time t?

Media Image
Media Image
Media Image
Media Image
Media Image

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