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- 1. Multiple Choice
One of two points, (like ends of a magnet), that have opposing magnetic qualities, is also called a ...
magnetic force
jedi force
north pole
magnetic pole
- 2. Multiple Choice
True or False. Large power plants use generators to convert mechanical energy into electrical energy.
True
False
- 3. Multiple Choice
Which rocks were the naturally occurring magnetic rocks found 3,000 years ago?
lodestones
magnostones
Magnesia
graphite
- 4. Multiple Choice
A region where a magnetic force can be detected is called a ....
magnetic force
magnetic field
mandalorian field
magnetic pole
- 5. Multiple Choice
What do "like" poles do?
have a neutral effect
attract
repel
create energy
- 6. Multiple Choice
What can you do to decrease the magnetism of a soft magnetic material?
cooling or hammering
elevate to higher altitude
bury in the ground
heating or hammering
- 7. Multiple Choice
Earth’s magnetic field lines run from where, to where?
geographic East to geographic West
geographic North to geographic West
geographic North to geographic South
geographic South to geographic North
- 8. Multiple Choice
What is a coil of wire with an electric current in it?
polaroid
solar coil
solenoid
battery
- 9. Multiple Choice
What is a coil that has a soft iron core that acts as a magnet when an electric current runs through it?
electromagnet
solenoid
magnetic coil
alternating current
- 10. Multiple Choice
What is an electric motor?
a device that converts electrical energy into mechanical energy
a device that converts heat energy into electrical energy
a device that converts mechanical energy into electrical energy
a device that converts chemical energy into electrical energy
- 11. Multiple Choice
What is an instrument that detects the direction of a small electric current?
barometer
galvanometer
voltmeter
electrometer
- 12. Multiple Choice
True or False. The strength of a magnetic field of a solenoid depends on the number of loops of wire and the amount of current in the wire.
True
False
- 13. Multiple Choice
True or False. The strength of a magnetic field of a solenoid decreases when the number of loops of wire decreases and the amount of current in the wire decreases.
True
False
- 14. Multiple Choice
What is a machine that converts mechanical energy into electrical energy?
electric motor
electromagnetic induction
generator
transformer
- 15. Multiple Choice
True or False. Large power plants use generators to convert electrical energy into mechanical energy.
True
False
- 16. Multiple Choice
Rotating the circuit or changing the strength of the magnetic field will do what to a current in the circuit?
reduce the current in a circuit
induce a current in the circuit
prevent the current from entering a circuit
breaking the current in a circuit
- 17. Multiple Choice
Does electromagnetic induction violate the law of conservation of energy?
Yes
No
- 18. Multiple Choice
What is Faraday's Law?
Electric energy energy cannot be created or destroyed
An electric current can be produced in a circuit by changing the magnetic field crossing the circuit
An electric current cannot be produced in a circuit by changing the magnetic field crossing the circuit
An electric current can be reduced in a circuit by changing the magnetic field crossing the circuit
- 19. Multiple Choice
A current that changes directions at regular intervals is called what?
a direct current
electromagnetic induction
alternating current
solenoid
- 20. Multiple Choice
The end result of turbines turning in a power plant, which rotates a core of wire, is....
production of potential energy
production of electrical energy
production of mechanical energy
production of thermal energy
- 21. Multiple Choice
What is a device that increases or decreases the voltage of alternating current?
electric motor
transistor
transformer
generator
- 22. Multiple Choice
What type of transformer is found in the power poles around towns, that resemble big metal cans?
step-down transformers
step-up transformers
side-step transformers
mid-step transformers
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