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- 1. Multiple Choice
What materials are needed to make an electric generator?
Electricity
Magnet
Conductive wire
Metal rod
- 2. Multiple Choice
What is NOT a way to change the strength of an electromagnet?
Change the amount of electricity
Change the amount of movement
Change the amount of loops
Change the metal rod material
- 3. Multiple Choice
Does an electromagnet need a magnetic field?
Yes
No
- 4. Multiple Choice
Dams are capable of producing electricity. What materials must must they use to produce electricity?
Conductive wire and magnet
Electricity
Electricity, conductive wire, and magnet
Electricity, conductive wire, and metal rod
- 5. Multiple Choice
How does the rod and electricity work together to make a strong electromagnet?
The magnetic field of the electricity lines up the domains in the metal rod
The magnet moves the free electrons in the metal rod
The conductive wire has free electrons
Electricity has a magnetic field
- 6. Multiple Choice
What is the special property of a metal rod?
It has free electrons
It has a magnetic field
It has domains
It has electricity
- 7. Multiple Choice
What is the energy conversion of an electric generator?
Electrical energy to mechanical energy
An electric generator has a magnetic field
Mechanical energy to electrical energy
Decrease amount of loops
- 8. Multiple Choice
What are the components of an electromagnet?
Metal rod
Magnet
Conductive wire
Domains
Electricity
- 9. Multiple Choice
TRUE or FALSE: A metal rod is an important part of an electromagnet.
True
False
- 10. Multiple Choice
Here is a picture of an electromagnet. How can you strengthen the electromagnet.
Add more loops of wire to the nail.
Use a smaller battery
Reverse the poles of the magnet
increase movement
- 11. Multiple Choice
Electric current is flowing through a wire, what surrounds the wire?
A glowing light
protons
A magnetic field
neutrons
- 12. Multiple Choice
What type of energy comes OUT of a generator?
Mechanical
Electrical
Thermal
Potential
- 13. Multiple Choice
What is this?
Electric generator
magnet
electric motor
electromagnet
- 14. Multiple Choice
How do electric generators work?
With magnet
When a magnet is moved in the conductive wire, the magnetic field in the magnets moves the free electrons in the wire
When domains are aligned
When electricity goes though a conductive wire
- 15. Multiple Choice
What kind of magnet can be turned on and off?
Electromagnets
Permanent magent
Electric motor
- 16. Multiple Choice
What are the differences between electromagnets and permanent magnets?
Electromagnets can be turned on and off
Electromagnets have magnetic field
Electromagnets use electricity
The strength of electromagnets can be changed
- 17. Multiple Choice
What is the relationship of electricity and magnetism?
One can make another
They have a magnetic field
They have free electrons
They have no relationship
- 18. Multiple Choice
What is the special property of electricity?
It has a magnetic field
It can become a permanent magnet
It has free electrons
It has domains
- 19. Multiple Choice
This material has domains and it is used in electromagnets
Electricity
Free electrons
Conductive wire
Metal rod
- 20. Multiple Choice
Maddie made an electric generator, but finds that it is too weak, What should she do to make her electric generator stronger?
Increase the speed of movement
Add another battery
Increase number of loops
Strengthen the magnet
Decrease movement
- 21. Multiple Choice
TRUE or FALSE: To make an electric generator one of the most important things you need is electricity
TRUE
FALSE
- 22. Multiple Choice
What do electromagnets produce?
Magnetic field
An electric current
Electricity
Domains
- 23. Multiple Choice
How do you weaken an electromagnet?
Decrease amount of electricity
Increase the strength of the magnet
Decrease amount of loops
Use a different metal rod material
- 24. Multiple Choice
Where does the electricity flow through in an electromagnet?
Conductive wire
Metal rod
Electricity
Permanent magnet
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