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PHY: Magnetism

Total questions: 27

Worksheet time: 21mins

Name
Class
Date
1.
If you drop or heat up a a magnet, what will eventually happen to it?
a)
the magnet will become stronger
b)
the magnet will demagnetize
2.
The lines on this image are called...
a)
magnetic field lines
b)
iron fillings
c)
graphite lines
d)
none of these
3.
This type of magnet is DIFFICULT to magnetize
a)
temporary
b)
permanent
4.
Magnetic NORTH is actually geographic _________
a)
SOUTH
b)
NORTH
c)
EAST
d)
WEST
5.
A Magnet can be used to create electricity
a)
True
b)
False
6.
Generators use __________ to create Electricity
a)
Electricity
b)
Magnetism
c)
Wires
7.
Magnets stick to any materials that are made of
a)
Iron, Nickel, Copper
b)
Iron, Nickel, Cobalt
c)
Ions, Nickel, Cobalt
d)
Iron, Lead, Cobalt
8.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
9.
True or False: All metals are attracted to magnet.
a)
True
b)
False
10.
This is a picture of a ________________ magnet.
a)
bar 
b)
circle 
c)
horseshoe
d)
paddle
11.
The space around a magnet where the force of a magnet can attract best is called__________
a)
magnetism
b)
bar magnet
c)
horseshoe magnet
d)
magnetic field
12.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
13.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
14.
An electromagnet's poles may be reversed by:
a)
decreasing the voltage of the coil
b)
increasing the number of coils
c)
changing the direction of current flow
d)
altering the material used to make the coils
15.
In un-magnetized materials the domains are __________ aligned.
a)
super
b)
slightly
c)
randomly
d)
always
16.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.
17.
A magnetized iron nail is called a ________ magnet.
a)
permanent
b)
temporary
c)
horseshoe
d)
industrial
18.

A horseshoe magnet will generate a magnetic field similar in shape to that of two ________ poles brought near each other.

a)

like

b)

opposite

c)

positive

d)

negative

19.

Which drawing is correct?

a)

1

b)

2

c)

3

d)

4

20.

How can a wire become magnetic?

a)

point it north

b)

add a resistor

c)

heat it up

d)

run a current through it

21.

What does the direction of the pointing fingers mean in this picture?

a)

the direction of the voltage

b)

the rotation of the wire

c)

the direction of the magnetic field

d)

the direction of the current

22.

How could you make a stronger electromagnet?

a)

more coils of wire

b)

add an iron core

c)

more current in the wire

d)

all three

23.

Is this material a magnet or just magnetic?

a)

just magnetic

b)

a magnet

c)

both

d)

neither

24.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles. 
d)
the middle.
25.

Choose the applications of magnets :

a)

Compass

b)

Electromagnetic strip

c)

Electric bell

d)

Ball bearing

e)

Watch

26.

The strength of a magnetic field in an electromagnet increases if :

a)

electric current decrease

b)

electric current increases

c)

number of turns of the coil decreases

d)

number of turns of the coil increases

27.

Choose the correct methods when using right hand grip rule.

a)

thumb follow the direction of electric current

b)

curled finger shows the direction of the magnetic field.

c)

magnetic field lines cross with one another

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