NEW
Font size
S
M
L
XL
WorksheetsMagnetism Review
Total questions: 37
Worksheet time: 9hrs 15mins
Name
Class
Date
1.
Magnets have a north and a south ___________
a)
shape
b)
color
c)
pole
d)
region
2.
Iron, Nickel and cobalt are all __________________ materials
a)
Shiny
b)
poles
c)
magnetic
d)
cold
3.
Where is the strongest attraction force of the magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
4.
Which of these is attracted to a magnet?
a)
iron nail
b)
copper penny
c)
piece of paper
d)
notebook
5.
Magnetism is a type of ____________
a)
force
b)
book
c)
plant
d)
animal
6.
The force of magnetism is stronger when magnets are ________________
a)
cold
b)
round
c)
closer together
d)
farther apart
7.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
8.
What do the lines around a magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
9.
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
10.
What is responsible for the Magnetic Field around Earth?
a)
The Earth's crust
b)
The Earth's molton iron core
c)
The Earth's mantel
d)
The Sun
11.
What part of an atom is the most responsible for magnetism?
a)
Proton
b)
Neutron
c)
Electron
12.
If you cut a bar magnet in half, each half
a)
becomes unmagnetized.
b)
becomes a bar magnet with two poles.
c)
contains one magnetic pole.
d)
is only temporarily magnetized.
13.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
14.
An alpha particle experiences a force of 4.1x10-13N when it travels at right angles through a 0.61T magnetic field. What is the velocity of the particle?
a)
-2.1 x 106 m/s
b)
7.82 x 105 m/s
c)
2.1 x 106 m/s
d)
-7.81 x 105 m/s
15.
Kron, the alien freedom fighter from planet Krimbar, shoots his gun that fires protons at a speed of 4.0x106m/s. What is Krimbar’s magnetic field if it creates a force of 2.88x10-15N on the protons?
a)
4.5 x 10-3 T
b)
-4.5 x 10-3 T
c)
1.15 x 10-40 T
d)
-1.15 x 10-40 T
16.
A proton traveling at 4.2 X 105 m/s encounters a 3.8 X 10-2 T magnetic field. What is the magnitude of the force applied by the field to the proton?
a)
-5.11 x 10-15N
b)
-2.55 x 10-15 N
c)
5.11 x 10-15N
d)
2.55 x 10-15 N
17.
A beam of electrons moves at right angles to a magnetic filed of 6.0x10-2T. The electrons have a velocity of 2.5x106m/s. What is the magnitude of the force on each electron?
a)
-1.5 x 105 N
b)
-2.4 x 10-14 N
c)
2.4 x 10-14 N
d)
1.5 x 105 N
18.
A device that uses a free-moving magnetic needle to show direction is a:
a)
lodestone
b)
magnet
c)
compass
d)
magnetic field
19.
It is possible for a magnet to have only one pole.
a)
No
b)
yes
20.
The greater the amount of loops you have....
a)
The less voltage
b)
The voltage stays the same
c)
The greater the voltage
d)
There is no change
21.
Magnetic domains are
a)
regions that may or may not be magnetized.
b)
clusters of atoms randomly aligned
c)
regions of atoms spinning in the same direction
d)
blocks of material
22.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
23.
Surrounding every magnet is a __________ __________.
a)
magnetic field
b)
electrical current
c)
another magnet
24.
Magnets that are arranged like this will _______.
a)
move away from each other (repel)
b)
move towards each other (attract)
25.
These magnets will _______.
a)
move away from each other (repel)
b)
move toward each other (attract)
26.
2 ways to increase the magnetic force of an electro-magnet
a)
Increase the current flow, reduce the number of coils
b)
Increase the voltage, decrease the number of coils
c)
Increase the number of coils and the current flow
d)
Spread out the coils, replace iron core with rubber.
27.
The groups of atoms which can align to create a magnet are called ________.
a)
domains
b)
magnetic units
c)
molecules
d)
electrons
28.
Electric current passing through a wire produces ________.
a)
permanent magnet
b)
magnetic field around wire
c)
compass
d)
geographic poles
29.
Where is Earth's magnetic field strongest?
a)
Along the outside lines
b)
Along the inside lines on either side
c)
Where the lines are close together at the poles
d)
In the space outside of the lines
30.
What is our best evidence that Earth has a magnetic field?
a)
All things fall toward Earth's center
b)
A compass needle lines up with it
c)
Winds blow from east to west
d)
Earth's oceans all have currents
31.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
32.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
33.
What is the device seen here?
a)
generator
b)
electric motor
c)
electromagnet
d)
magnet
34.
Which is NOT a use of magnets?
a)
Generating electricity
b)
Holding cabinet doors closed
c)
Sorting paper from plastic
d)
Storing information on computer hard drives.
35.
You know this substance is magnetized because
a)
all the domains have right angles
b)
the arrows are drawn in red
c)
the domains are aligned
d)
the domains are random
36.
A wire 1.5 m long carrying a current of 18A is at right angles to a 1.40T magnetic field. How strong is the force acting on the wire?
a)
3.78 x 103N
b)
37.8 N
c)
19.3N
d)
1.93 x 103N
37.
Power lines carrying a current of 120A run at right angles to Earth's magnetic field of 6.5 x 10-5T. If the power lines experience a force of 5.0 x 10-2N, how long is the power line?
a)
2.71 m
b)
6.41 x 10-8 m
c)
2.71 x 10-8 m
d)
6.41 m
Reset
