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WorksheetsMagnetism - 3.P.3B.1 & 3.P.3B.2
Total questions: 20
Worksheet time: 3600secs
A(n) ______________ is produced when an electrical current passes through a coil of wire wrapped around any core that can be magnetized.
electric circuit
electromagnet
magnetic field
light bulb
When an electrical current is running through the wire in an electromagnet, the magnetic core produces a _______________.
magnetic field
simple circuit
magnet circuit
battery
Which of the following will attract a magnetic force?
Two magnets with both N & N facing each other
Two magnets with both S & S facing each other
Two magnets with N & S facing each other
Magnets will always attract regardless of the direction of the poles.
Which of the following will repel a magnetic force? Select ALL that apply:
Two magnets with both N & N facing each other
Two magnets with both S & S facing each other
Two magnets with N & S facing each other
Magnets will always attract regardless of the direction of the poles.
Select ALL of the materials that can be used to create an electromagnet:
conductive wire
wooden insulator
battery
iron nail/bolt
plastic straw
Magnets and electromagnets have the following unique properties:
strength, attraction, repulsion, magnetism
strength, attraction, electricity, magnetism
polarity, electricity, magnetism, attraction
polarity, repulsion, strength, attraction
Magnets attract certain types of
wood, such as sticks, logs, and pencils
plastic, such as straws, bags, and toys
metals, such as iron, nickel, and steel
all of the above
True or False:
Like poles attract each other, while unlike poles repel each other.
True
False; opposite poles attract
Which of the following would most likely make an electromagnet stronger?
Adding another battery
Using a longer wire
Removing the nail
Wrapping the wire loosely around the nail
Where is the magnetic pull or attraction the strongest on a magnet?
At the center of the magnet
At its poles
Only on one pole
It is the same strength everywhere
When iron nails or steel paper clips are held near a magnet, they will
not move at all
move away, or repel from the magnet
move toward, or be attracted to, the magnet
move toward, or repel from the magnet
True or false: Some magnets have a greater strength than other magnets.
True
False; all magnets strength are created equally.
How can you compare the strength of an electromagnet?
By counting the amount of objects the magnet can pick up.
By looking at different electromagnets and choosing the prettiest one.
By changing multiple variables within an experiment.
Every electromagnet has the same strength.
Keyla planned an investigation to test the strength of electromagnets. In one electromagnet she used one battery and a bolt with a thicker core. In the other electromagnet she used two batteries and a thinner core.
Was this a fair test?
Yes, because she tested the correct number of variables.
Yes, because the number of batteries does not matter.
No, because she changed more than one variable.
No, because the number of batteries does not matter.
Explain how an electromagnet creates energy in order to magnetize a bolt or nail to pick up paperclips.
The paper clips are magnets.
The electric current in the circuit magnetizes the nail.
The electric current in the circuit melts the nail.
The nail heats up causing it to become a magnet.
A student designed an experiment in order to create an electromagnet. Below are the procedures in the experiment:
- Make one electromagnet with one battery and the other with two batteries.
- Use the same size bolt for each electromagnet.
- Wrap the wire around the bolts the same number of times.
- Measure the strength of each electromagnet by picking up paperclips.
What is the manipulated variable in her investigation?
The same size bolt
The number of wire coils around the bolt
The number of batteries used
The number of paperclips the electromagnet picks up
Why would an electromagnet with an iron core pick up more paperclips than an electromagnet with a plastic core?
Iron cores make electromagnets stronger.
Plastic cores make electromagnets stronger.
Iron cores are insulators of energy.
It does not matter what material the core of an electromagnet is.
The controlled variable(s) in an experiment
stay the same and remain unchanged throughout the entire investigation.
change throughout the investigation.
can change or stay the same depending on the investigation.
is what happens as a result of the investigation.
The manipulated or independent variable in an experiment
stays the same and remains unchanged throughout the entire investigation.
changes throughout the investigation.
can change or stay the same depending on the investigation.
is what happens as a result of the investigation.
The responding variable(s) in an experiment
stays the same and remains unchanged throughout the entire investigation.
changes throughout the investigation.
can change or stay the same depending on the investigation.
is what happens as a result of the investigation.
