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WorksheetsElectricity and Magnetism Review
Total questions: 21
Worksheet time: 17mins
What two forces are required for generators and electric motors to work?
magnetism and thermal
electricity and thermal
electricity and magnetism
magnetism and radiant
Electricity is produced by using steam to _____________.
What would happen if you broke a bar magnet into 8 pieces?
You would have 8 half magnets
You would have 4 complete magnets
You would have 8 complete magnets
They wouldn't be magnets anymore
A transformer actually transforms
voltage
magnetic field lines
generators into motors
A device that transforms mechanical energy to electrical energy is a
generator
motor
transformer
magnet
A device that transforms electrical energy to mechanical energy is a
generator
motor
transformer
magnet
Why did this simple electric motor work?
The current from the battery induces a magnetic field in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet
The electromagnet on top of the battery pulls on the magnetic copper wire
The magnet induces a current in the copper loop which makes it rotate.
The magnetic field from the battery induces an electric current in the copper loop, turning it into an electromagnet that repels from/attracts to the permanent magnet
How are electromagnets different from permanent magnets?
magnets can be turned on/off
you can turn an electromagnet on/off
magnets are more powerful
magnets have a North and South pole
An ideal transformer has 12 V input voltage with 10 turns on the primary (input) coil, and 100 turns on the secondary coil has. What is the secondary voltage?
0.12 V
1.20 V
12.0 V
120.0 V
