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- 1. Multiple ChoiceWhat is the purpose of a generator?to convert electrical energy to mechanical energyto convert chemical energy to electrical energyto convert mechanical energy to electrical energyto convert mechanical energy to heat energy
- 2. Multiple ChoiceA student is investigating how changing the size of the core of an electromagnet affects its strength. Which of these is most likely the dependent variable in the student's investigation?the number of wire coils wrapped around the corethe number of paper clips picked up by the electromagnetthe voltage of the battery used in the circuitthe size of the piece of iron used as the core
- 3. Multiple Choice
How are fossil fuels used to generate electrical energy?
Heat from burning fuel creates steam that spins a turbine.
Heat from burning fuel spins magnets inside an electric motor.
Heat from burning fuel causes an electric motor to produce a current.
Heat from burning fuel creates steam that turns a transformer.
- 4. Multiple Choice
A temporary magnet that only works when electricity is passed through wires surrounding an iron core is called:
electromagnet
galvanometer
induction
super conductor magnet
- 5. Multiple ChoiceWhat two forces are required for generators and electric motors to work?magnetism and thermalelectricity and thermalelectricity and magnetismmagnetism and radiant
- 6. Multiple ChoiceGenerators are devices that convert _____ energy into _____ energy.chemical; mechanicalmechanical; electricalelectrical; mechanicalpotential; kinetic
- 7. Multiple Choice
What is the transfer of energy in when you plug in a motor and it spins?
chemical to mechanical
electrical to mechanical
mechanical to electrical
physical to potential
- 8. Multiple Choice
A device that protects a circuit by from having too much current is called a
switch
short
fuse or breaker
resistor
- 9. Multiple Choice
Voltage is
the potential electrical energy or push that makes electrons flow
causes a short circuit with electrical energy
is the term used for rate of charge flow
Wastes energy by allowing current to flow
- 10. Multiple Choice
A laptop is plugged into a 120 V outlet and uses 60 ohm's of resistance. How much current is running though it?
120 Amps
60 Amps
2 Amps
20 Amps
- 11. Multiple Choice
You can increase the strength of an electromagnet are increasing the current, adding iron to the core, and .....
increasing the number of coils on the magnet
Decreasing the number of coils on the magnet
Dividing the number of coil
- 12. Multiple Choice
A generator converts.....
Mechanical Energy to Chemical Energy
Mechanical Energy to Nuclear Energy
Electrical Energy to Sound Energy
Mechanical Energy to Electrical Energy
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