wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Chapter 19: Electromagnetic induction

Total questions: 45

Worksheet time: 45mins

Name
Class
Date
1.

A bar magnet is pushed into a coil connected to a sensitive ammeter, as shown in the diagram, until it comes to rest inside the coil.


Why does the ammeter briefly show a non-zero reading?

a)

The magnetic flux linkage in the coil increases then decreases.

b)

The magnetic flux linkage in the coil increases then becomes constant.

c)

The magnetic flux linkage in the coil decreases then increases.

d)

The magnetic flux linkage in the coil decreases then becomes constant.(

2.

The magnetic flux through an area is:

a)

ϕ= B×A\phi=\ B\times A

b)

ϕ=B⋅A\phi=B\cdot A

c)

ϕ =A×B\phi\ =A\times B

d)

There is no magnetic flux through an area

3.

The S.I. unit of magnetic flux is

a)

Tesla

b)

Weber

c)

Joule

d)

Newton

4.

One Tesla is also equal to

a)

Wb m−2Wb\ m^{-2}

b)

Wb m2Wb\ m^2

c)

Wb mWb\ m

d)

Has no unit

5.

Magnetic flux will be maximum if the angle between magnetic field strength and vector area is:

a)

0°0\degree

b)

60°60\degree

c)

90°90\degree

d)

180°180\degree

6.
___ Law says that the Induced current is proportional to the change of magnetic flux 
a)
Lenz'
b)
Faraday's
c)
Ampere's
7.
___ Law says that a current produced by an induced emf moves in a direction so that its magnetic field opposes the original change in flux
a)
Lenz'
b)
Faraday's
c)
Ampere's
8.
What would happen if I move a bar magnet in and out of a coil of copper wire?
a)
Electric current would disappear 
b)
The magnet would explode 
c)
Electric current will flow through the wire
d)
It would produce a gravitational field
9.

What happens to the galvanometer if the copper rod is moved upwards?

a)

No change

b)

Deflect to the right

c)

Deflect to the left

d)

Deflect to the right and left

10.

Which action will increase the deflection of the galvanometer pointer?

a)

The magnetic pole is reversed

b)

The number of turns of coils is increased

c)

The coil is made from insulated wire

d)

The magnet is slowly pushed into the coil

11.
How could the experimenter increase the amount of electricity being induced by this experiment?
a)
Increase the number of coils
b)
Decrease the number of coils
c)
Flip the magnet around
d)
Nothing, the amount of electricity cannot be increased
12.

Click all the factors affecting electromagnetic induction

a)

Strength of magnet

b)

The area of the coil

c)

The speed of movement

d)

Number of turns of coil

e)

The position of poles

13.
Electromagnetic induction is change in ___________________. 
a)
surface area
b)
magnetic poles
c)
magnetic flux
14.

Direction of deflection of the galvanometer pointer can be determined by

a)

Lenz's Law

b)

Faraday's Law

c)

Fleming's Left Hand Rule

d)

Fleming's Right Hand Rule

15.

Faraday's Law states that the induced emf is proportional to ______

a)

the current

b)

the cross sectional area of the coil

c)

the rate of change in the flux of the coil

16.

The SI units of induced emf is

a)

Ohm

b)

Volt

c)

Henry

d)

Tesla

17.

Identify the phenominon by which an induced emf can be generated:

a)

By moving magnet towards a coil

b)

By rotating a coil in a magnetic field

c)

By moving a coil towards stationary magnet

d)

emf cannot be induced

18.

When a loop of wire is moved across a magnetic field, the current is produced in it is called

a)

Induced current

b)

Photo electric current

c)

Alternating current

d)

Direct current

19.

emf is induced due to change in:

a)

Charge

b)

Current

c)

Magnetic Flux

d)

Electric Flux

20.

The emf induced by motion of conductor across magnetic field is called

a)

Potential Difference

b)

Electric potential

c)

Variable emf

d)

Motional emf

21.

The relation of motional emf , when a conductor is move in perpendicular magnetic field, is:

a)

ϵ = Blv\epsilon\ =\ Blv

b)

ϵ = qBl\epsilon\ =\ qBl

c)

ϵ = BlI\epsilon\ =\ BlI

d)

ϵ = qvB\epsilon\ =\ qvB

22.

If velocity of a conductor moving through a magnetic field B is made zero, then motional emf is:

a)

−Blv-Blv

b)

−vBl-\frac{v}{Bl}

c)

zero

d)

−Blv-\frac{Bl}{v}

23.

Determine the direction of induced current if the magnetic field is increasing.

a)

Clockwise

b)

Counter clockwise

c)

No induced current

24.

Determine the direction of induced current if the magnetic field is decreasing.

a)

Clockwise

b)

Counter clockwise

c)

No induced current

25.

Determine the direction of induced current if the magnetic field is constant.

a)

Clockwise

b)

Counter clockwise

c)

No induced current

26.

Unit for self induction

a)

Volt

b)

Wb

c)

T

d)

Henry

27.

What is the symbol of self induction

a)

N

b)

B

c)

Ɛ

d)

L

28.

Give the formula energy stored in an inductor

a)

Ɛ= Blv

b)

U= ½ LI²

c)

E= ½ mv²

d)

Φ=B · A

29.
When do we have self induction?
a)
When the magnet moves into the coil
b)
When the coil moves into the magnet
c)
When a constant current passes through the coil
d)
When a changing current passes through the coil
30.
When current increases in a coil, the induced current will be
a)
in the same direction
b)
in the opposite direction
c)
clockwise
d)
counterclockwise
31.

Which coil will have the largest flux?

a)

A

b)

B

c)

C

d)

D

32.

Self inductance of solenoid is:

a)

L = μ0nAlL\ =\ \mu_0nAl

b)

L =μ0N2AlL\ =\mu_0N^2Al

c)

L = μ0n2AlL\ =\ \mu_0n^2Al

d)

L =μ0NAlL\ =\mu_0NAl

33.

if an inductor has N turns and is magnetic flux through its each turn when current I is flowing, then self-inductance L is given by formula:

a)

INϕ\frac{I}{N\phi}

b)

NϕN\phi

c)

NϕI\frac{N\phi}{I}

d)

NϕIN\phi I

34.

An inductor is a circuit element that can store energy in

a)

Magnetic field

b)

Electric flux

c)

Electric field

d)

None

35.

Changing current in a coil produces e.m.f in another, this phenomenon is known as

a)

e.m.f

b)

Self-induction

c)

Induced e.m.f

d)

Mutual induction

36.

Which device use the concept of mutual inductance?

a)

DC generator

b)

Transformer

c)

Working coil galvanometer

d)

Wheatstone bridge

37.

The mutual induction between two coils depends upon:

a)

area of the coils

b)

distance between the coils

c)

number of turns

d)

Does not depends on anything

38.

Number of magnetic field line passes through an area is the definition for

a)

magnetic flux

b)

current carrying conductors

c)

induced emf

d)

magnetic field

39.

An inductor ____.

a)

stores energy in electric field

b)

Provides a specific value of inductance

c)

controls the current

d)

Stores energy in a magnetic field

40.

Lenz’s law deals with:

a)

Magnitude of emf

b)

Direction of emf

c)

Resistance

d)

Direction of induced current

41.

If the magnetic flux through the circuit through the circuit is increasing, then induced emf acts to ________ the magnetic flux

a)

Increase

b)

Decrease

c)

Zero

d)

None of these

42.

If the magnetic flux through the circuit through the circuit is decreasing, then induced emf acts to ___________________ the magnetic flux.

a)

Increase

b)

Decrease

c)

Zero

d)

None of these

43.

What must occur for a magnetic field to induce an electric current?

a)

The magnetic field must be really big

b)

The magnetic field must be stable

c)

The magnetic field must be changing

d)

The magnetic field must be from a permanent magnet

44.

The turn is contained in a magnetic field such that the lines of induction of the magnetic field are parallel to the plane of the turn. Which statement is correct?

a)

An induction current flows clockwise;

b)

The induction current in the coil flows counter-clockwise;

c)

The induction current in the coil will occur when the magnetic field induction changes;

d)

There is no induction current in the coil.

45.

Two coils X and Y arc arranged as shown in
the diagram below.


One quarter of the magnetic flux produced by the current in X is linked with Y. The mutual inductance between the coils is M. What is the mutual inductance when Y is the primary coil?

a)

A   M4\frac{M}{4}  

b)

B    M2\frac{M}{2}  

c)

C     MM  

d)

D    4M4M  

Similar Resources on Wayground

2D Motion and Newton's Law Test Review

40 questions

2D Motion and Newton's Law Test Review

quiz

Worksheet

•

9th - 12th Grade

SHM 24/25

43 questions

SHM 24/25

quiz

Worksheet

•

9th - 12th Grade

Active Physics Midterm Review (2425)

46 questions

Active Physics Midterm Review (2425)

quiz

Worksheet

•

9th - 12th Grade

PhySci Finals Reviewer

40 questions

PhySci Finals Reviewer

quiz

Worksheet

•

12th Grade

X BAHASA INGGRIS

50 questions

X BAHASA INGGRIS

quiz

Worksheet

•

University

Static And Current Electricity

45 questions

Static And Current Electricity

quiz

Worksheet

•

9th - 12th Grade

Unit 2 Motion Review

41 questions

Unit 2 Motion Review

quiz

Worksheet

•

9th - 12th Grade

PS Exam #3

44 questions

PS Exam #3

quiz

Worksheet

•

9th - 12th Grade