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- 1. Multiple Choice
Which of the following is not a subatomic particle that makes up an atom?
neutron
proton
nucleon
electron
- 2. Multiple Choice
Protons have a ____________ charge.
negative
neutral
positive
- 3. Multiple Choice
Electrons have a ____________ charge.
negative
neutral
positive
- 4. Multiple Choice
A charged atom is called a(n) __________.
proton
neutron
electron
ion
- 5. Multiple Choice
A current is produced when _______________ flow in a circuit.
protons
neutrons
electrons
nucleons
- 6. Multiple Choice
What happens when an electric current flows through a wire?
The wire begins to spin.
Nothing happens.
A field of gravity is created around the wire.
A magnetic field is created around the wire.
- 7. Multiple Choice
Electric current is measured in ____________.
Newtons (N)
Amperes (A)
Hertz (Hz)
- 8. Multiple Choice
The south ends of two magnets will _________ each other.
repel
attract
- 9. Multiple Choice
________________ are the attractive and repulsive forces between two poles.
Magnetic forces
Electric forces
Magnetic charges
Electric charges
- 10. Multiple Choice
What does this image show?
Parallel circuit
Series circuit
Magnet
Electromagnet
- 11. Multiple Choice
Opposite charges do what?
Attract
Repel
- 12. Multiple Choice
The area of magnetic force around a magnet is known as its ____________.
magnetism
magnetic current
magnetic field
electric current
- 13. Multiple Choice
How do you increase the strength of an electromagnet?
Add a motor and/or light bulbs
Add more light bulbs and wire coils
Add more wire coils
Increase the voltage
- 14. Multiple Choice
What is/are the difference(s) between a magnet and an electromagnet?
An electromagnet can be turned on/off.
A magnet can be turned off.
An electromagnet is stronger.
- 15. Multiple Choice
A _______________ is a current-carrying coil of wire with many loops.
magnet
electromagnet
solenoid
compass
- 16. Multiple Choice
How can a magnet be used to produce an electric current?
Hold a magnet next to a piece of wire.
Wrap wire around a magnet.
Spin the magnet around inside a coil of wire.
- 17. Multiple Choice
A _____________ transforms mechanical energy into electrical energy.
generator
electromagnet
circuit
magnetic field
- 18. Multiple Choice
Increasing the number of coils in an electromagnet will _________ the power of the magnet.
decrease
increase
not affect
- 19. Multiple Choice
What three minerals are attracted to a magnet?
Gold, copper, cobalt
Cobalt, aluminum, silver
Iron, copper, aluminum
Iron, nickel, cobalt
- 20. Multiple Choice
An atom becomes _______ when it gains electrons.
Positive
Neutral
Negative
Invisible
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