Show:
Vocabulary
Magnetism
Electromagnetism
Motors/Generators
Miscellaneous
100
What is a device that increases or decreases the voltage of alternating current?
What is a transformer.
100
Why do domains need to be lined up?
What is so a magnet can remain magnetic.
100
How does the iron nail within an electromagnet become magnetic?
What is it has an electric current go through it, which makes it magnetic.
100
Which device would need a physical force to start?
What is an electric generator.
100
What is the difference between a step-up and step-down transformer
What is a step-up transformer increases voltage and a step-down transformer decreases voltage.
200
What is a coil of wire with an electric current in it?
What is a solenoid.
200
What is the strongest part of a bar magnet's magnetic field? What is the weakest part?
What is the strongest is at the magnetic poles. The weakest is at the center of the bar magnet.
200
Name two ways to strengthen an electromagnet.
What is by increasing the voltage and the number of coils.
200
What is the power source of an electric motor?
What is a battery or electric source.
200
What is the difference between an independent and dependent variable?
What is the dependent variable is affected by the change of an independent variable.
300
What are the parts of an electromagnet?
What is a power source, wire, iron core(nail), and solenoid.
300
Where is the Earth's magnetic south pole located?
What is somewhere near the geographic north pole
300
Draw and label the parts of an electromagnet.
What is answers will vary.
300
How are motors and generators similar?
What is they both convert electrical and mechanical energy.
300
Explain how a switch can be used to turn a light on and off. Within your description, the following key words must be used correctly: Open circuit, Closed circuit, and electric current
What is with an open circuit, the light is turned on because electric current flows through. With a closed circuit, the light is off and no electric current is flowing through.
400
What is the process of creating a current by changing the magnetic fields?
What is electromagnetic induction
400
Compare the Earth's magnetic field to a bar magnet's magnetic field.
What is they are similar because they both have a north and south pole and are strongest at the poles.
400
Describe how Maglev trains are related with electromagnetism.
What is Maglev trains run off of electromagnetism.
400
Describe how an electric motor works.
What is an electric motor has an electric current that runs through it from the power source, which it converts to mechanical energy through the repulsion of the electromagnet and permanent magnet. This makes the armature spin.
400
What is the difference between a permanent magnet and a temporary magnet?
What is a permanent magnet is harder to magnetize, but is harder to demagnetize. A temporary magnet is easier to magnetize.
500
What is the difference between an electric motor and an electric generator?
What is an electric motor converts electrical energy to mechanical energy. An electric generator converts mechanical energy to electrical energy.
500
Is the magnetic properties of the earth more similar to a bar magnet or an electromagnet? Explain your reasoning
What is a bar magnetic because the earth does not need an electric force in order to maintain its magnetic properties.
500
Compare and contrast a bar magnet and electromagnet.
What is they both are types of magnets, but a bar magnet is a permanent magnet and an electromagnet is temporary.
500
Draw and label the parts of an electric motor.
What is answers will vary.
500
How could someone cause electromagnetic induction? What is produced (2 points)?
What is someone could change the magnetic fields by putting a magnet through coils, which produces an electric current.