Magnetism worksheet
1. What are the 2 criteria necessary for a substance to be considered a magnet?
__________________________
__________________________
2. State where you will see repulsion or attraction between the bar magnets.
3.
N
S
S
N
S
s
n
n
Draw a magnetic field for each of the following examples.
N
A)
N
S
N
S
B)
N
S
S
N
N
4. The circles below represent compasses. In each situation, draw the needles of the
compasses, using an arrow to show the direction they point.
a)
b)
5. A soft iron rod is magnetized with a bar magnet, as shown in the diagram below.
Identify the poles of the iron rod.
N
S
6. Draw the position of the needle in each of the compasses placed near the magnets or
wire illustrated below.
a)
b)
N
N
S
S
Compass I
Compass II
7. Which of the illustrations below is an accurate representation of the magnetic field of a
bar magnet? Explain your answer.
a)
b)
8. Maria sprinkles iron filings on a piece of cardboard placed on top of a bar magnet. Which
configuration will the iron filings take?
A)
C)
N
S
B)
N
S
D)
N
S
S
N
9. A magnet is surrounded by a magnetic field which is shown by lines of force. Which one of the
following diagrams correctly represents the magnetic lines of force around a magnet?
A)
C)
S
S
N
S
N
N
B)
D)
S
N
10. Which of the following diagrams correctly shows the direction in which the compass
needle will point?
A)
B)
C)
D)
11. Among the following diagrams, which correctly illustrates a magnetic field?
S
A)
B)
N
N
C)
S
N
compass
S
D)
N
N
12. Two magnets are placed end to end. Which diagram correctly illustrates the magnetic fields
around these magnets?
A)
C)
N
S
N
S
B)
N
S
N
S
N
S
N
S
D)
N
S
N
S
13. A magnet creates what is known as a magnetic field. A compass can be used to show the
magnetic field. Which of the following statements are true?
1.
If a bar magnet is broken in two, each piece will only have one magnetic pole.
2.
Like poles repel each other.
3.
The needle of a compass is a small magnet.
A)
1 and 2
B) 1 and 3
C) 2 and 3
D) All are true
Name:
_______________________
1.
Do magnets have to touch each other in order to experience a magnetic
force? Explain.
2.
Explain how a compass works
3. a. When you break a magnet in half, how many poles does each piece have?
Explain.
b. If you drop a small magnet repeatedly, it becomes demagnetized. Explain
what is happening sub-atomically.
4.
Why are iron atoms so strongly affected by magnetic fields?
5.
Why does a very strong magnet attract both poles of a weak magnet?
6.
A strong magnet in a junkyard can lift a car; what does this tell you about
the relative strength of the magnetic and gravitational forces on the car?
7.
Does the north pole of a magnet point to the north magnetic pole of the
earth? Explain.
PHYSICSFundamentals
© 2004, GPB
10-03