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- 1. Multiple Choice
Electrons have a ____________ charge.
negative
neutral
positive
- 2. Multiple Choice
A current is produced when _______________ flow in a circuit.
protons
neutrons
electrons
nucleons
- 3. 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.
- 4. Multiple Choice
Electric current is measured in ____________.
Newtons (N)
Amperes (A)
Hertz (Hz)
- 5. Multiple Choice
The south ends of two magnets will _________ each other.
repel
attract
- 6. Multiple Choice
________________ are the attractive and repulsive forces between two poles.
Magnetic forces
Electric forces
Magnetic charges
Electric charges
- 7. Multiple Choice
What does this image show?
Parallel circuit
Series circuit
Magnet
Electromagnet
- 8. Multiple Choice
The area of magnetic force around a magnet is known as its ____________.
magnetism
magnetic current
magnetic field
electric current
- 9. 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
- 10. Multiple Choice
A _______________ is a current-carrying coil of wire with many loops.
magnet
electromagnet
solenoid
compass
- 11. Multiple Choice
Increasing the number of coils in an electromagnet will _________ the power of the magnet.
decrease
increase
not affect
- 12. Multiple ChoiceHow do you make an electromagnet stronger?Add a motor and/or lightbulbsAdd more light bulbs and/or wire coilsadd more wire coils and/or a switchadd more wire coils and/or batteries
- 13. Multiple Choice
What would happen with the magnets in the picture above?
They would repel
Nothing
They would attract
They would repel and then attract
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