WorksheetsU2L2 - Magnets and Magnetic Force
Total questions: 20
Worksheet time: 3mins
What subatomic particle causes magnetism in an atom?
protons
nucleus
neutrons
electrons
1. Which of the materials below can be attracted by a magnet? Check ALL that apply.
Iron
Gold
Copper
Nickel
Cobalt
2. We know the substance in the image is magnetized because...
all the domains are at right angles to each other.
the domains are aligned.
the arrows are drawn in red.
the domains are not aligned.
3. How will these two magnets interact?
they will repel each other.
they will attract each other.
they will exert no force on each other.
They will both turn to the right.
5. The permanent bar magnet and solenoid pictured are equal in strength. How could the force between the two magnets be increased? Select ALL that apply.
The magnets could be moved closer together.
The current in the solenoid could be decreased.
The permanent magnet could be turned around.
The number of loops in the solenoid could be increased.
6, Bob made an electromagnet but it was very weak. How can he make it stronger?
use fewer loops of wire
wrap the wire loosely
add more loops of wire to the electromagnet
take away one of the batteries.
7. Which is NOT a property of a magnet?
All magnets have two poles.
All magnets have a force of attraction or repulsion.
All magnets are surrounded by a magnetic field.
All magnets can be turned on and off.
8. This large crane magnet functions only when the electrical current is ON. The crane magnet is an example of what type of magnet?
Horseshoe Magnet
Electromagnet
Ceramic Magnet
Bar magnet
9. If you cut a bar magnet in half you end up with...
a magnet with only a north pole.
a magnet with only a south pole
two smaller magnets with both north and south poles.
a material that has no magnetism.
10. Electric current is ...
always positive.
the continuous flow of electrical charges.
a build up of electrical charge.
the flow of protons.
11. When an electric current runs through a wire, a magnetic field is created ...
around the wire.
parallel to the wire.
under the wire.
through the wire.
12. In a simple electromagnet like the one pictured, what factor does NOT change the strength of the magnet?
The number of batteries.
The number of wraps of the wire.
The material that the wire is made of.
The size of the paper clips.
When electric charges move, they....
cause the protons to move.
turn from negative to positive.
generate a magnetic field.
Electromagnetic induction occurs when a current is generated by a changing magnetic field. Which factors increase the current?
The speed you move the magnet.
Whether the magnet touches the solenoid.
The number of loops in the solenoid.
The strength of the magnet.
A compass points north because of the Earth's ________ field?
electrical
magnetic
gravitational
static
What is the area around a magnet that can attract or repel other objects in that area?
Friction
Magnetic Fission
Magnetic Field
Force
What is one main difference between an electromagnet and a permanent magnet?
An electromagnet can be turned on and off, while a permanent magnet cannot.
A permanent magnet can be turned on and off, while an electromagnet cannot.
Electromagnets do not have magnetic poles, while permanent magnets do.
Permanent magnets can only attract materials, while electromagnets can attract and repel.
What is another main difference between a permanent magnet and an electromagnet?
Permanent magnets can be turned on and off
Electromagnets require an electric current to work
Permanent magnets are always stronger
Electromagnets are made of plastic
What is an electromagnet?
a magnet that becomes neutral due to electricity
a magnet created by electric current flowing through wires
a magnet that produces electricity
a electrical current that has magnets
This object is...
magnetized.
positively charged.
not magnetized.
negatively charged.
