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Magnetism and Electromagnetic Induction

Total questions: 20

Worksheet time: 30mins

Name
Class
Date
1.
___ Law says that the Induced current is proportional to the change of magnetic flux 
a)
Lenz'
b)
Faraday's
c)
Ampere's
2.
___ 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
3.
In 1831 who discovered electromagnetic induction?
a)
Thomas Edison
b)
Nikola Tesla
c)
Michael Faraday
4.
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
5.

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

6.

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

7.
The voltmeter is at 0 in this image. How would you manipulate the experiment to create electricity (measured in volts)?
a)
Flip the magnet around so the North pole is facing out
b)
Move the magnet back and forth
c)
Take the magnet out
d)
Add more coils around the paper cylinder
8.
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
9.
What benefit is gained by the addition of the iron core in an electromagnet?
a)
It makes a strong magnet weaker
b)
It makes a weak magnet stronger
c)
There is no benefit at all
d)
It lets currents interact with each other
10.

As the north pole of the magnet is moved into the coil, the magnetic flux is _________.

a)

increasing

b)

decreasing

c)

remains constant

d)

depends on the speed of the magnet

11.
A device that converts mechanical energy into electrical energy
a)
A. electric generator
b)
B. electric motor
c)
C. electromagnetic induction
d)
D. mechanical  generator
12.

What happen to the Galvanometer?

a)

Deflected to the right

b)

Deflected to the left

c)

Nothing happen

13.

What is the Pole at X

a)

North

b)

South

14.

What happen to the Galvanometer?

a)

Deflected to the right

b)

Deflected to the left

c)

Nothing happen

15.

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

16.

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

17.
Electromagnetic induction is change in ___________________. 
a)
surface area
b)
magnetic poles
c)
magnetic flux
18.

Based on the picture in red box,

Why the Galvanometer pointer is at the middle?

a)

Current flow through wire

b)

There is change in magnetic flux

c)

No change in magnetic flux

19.

The graph represents

a)

DC Generator

b)

AC Generator

20.

How to increase the induced current?

a)

Change carbon brush

b)

Change position of the pole

c)

Use small scale Galvanometer

d)

Increase number of coils