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- 1. Multiple Choice
__ discovered that an electric current could make a magnetic field.
Benjamin Franklin
Hans Christian Oersted
Albeert Einstein
Donald John Trump
- 2. Multiple Choice
The first scientist to discovered an electric current from a magnetic field.
Joseph Henry
King Henry VIII
Henry Ford
Josephine Baker
- 3. Multiple Choice
This scientist from Great Britain, published his results of the discovery of electric currents first.
Joseph Henry
Michael Faraday
- 4. Multiple Choice
The process of creating a current in a circuit by a changing a magnetic field is called
magnetic fermement
electromagnetism calculation
electromagnetic induction
magnetic generalization
- 5. Multiple Choice
An electric current is made when a magnet moves in a coil of wire and when a wire moves between the ples of a magnet.
true
false
- 6. Multiple Choice
Electric motors turn electrical energy into
mechanical energy
gravitational pull
solar energy
fossil fuels
- 7. Multiple Choice
An electric generator uses electromagnetic induction to change mechanical energy into electrical energy.
true
false
- 8. Multiple Choice
How does a generator produce an electric current?
Energy from the sunlight is absorbed by the PV cells in the pane
A file is transmitted a few seconds at a time over the Internet.
The fuel is injected into the combustion chamber and combined with air
Rotates a coil of wire through a magnetic field which induces an electric current in the wire
- 9. Multiple Choice
The source in nuclear power plants is
thermal energy
fossil energy
hydroelectric power
geothermal power
- 10. Multiple Choice
A __ increases or decreases the voltage of alternating current.
Heater
Transformer
Electric Pole
Nuclear Plant
- 11. Multiple Choice
The number of loops in the primary and secondary coils of a transformer does not affect voltage.
true
false
- 12. Multiple Choice
A step-up transformer has more loops of wire in the secondary coil, so it increases voltage and decreases current.
true
false
- 13. Multiple Choice
A step-down transformer has fewer loops of wire in the secondary coil, so it decreases voltage and increases current
true
false
- 14. Multiple Choice
How many step-down transformers decrease the voltage before the current enters your home?
1
2
3
4
- 15. Multiple Choice
The voltage is stepped up thousands of times at the power plant
true
false
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