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- 1. Multiple Choice
Magnetic Field lines around a bar magnet:
are perpandicular the the magnet
spread out from north pole and curve to south
Cross back and forth over eachother
are perfectly straight
- 2. Multiple Choice
Magnetic poles that are UNLIKE will:
attract
repel
do nothing
all of these.
- 3. Multiple Choice
As the earth rotates, the magnetic poles:
stay the same
change a little
Switch completely
disappear
- 4. Multiple Choice
The earth is like a magnet because:
It has a magnetic field due to its core
it has a magnetic field do to its crust
There is a magnetic pole in the earth's core
Gravity generates a magnetic field
- 5. Multiple Choice
You can increase the strength of an electromagnet by:
Decreasing the battery charge
Decreasing the amount of loops in the solenoid
Winding the coils more closely
Winding the coils more loosely
- 6. Multiple Choice
On an atomic level, what creates a magnetic force?
gravity
electrons
protons
neutrons
- 7. Multiple Choice
Running electricity through metal produces:
a magnet
a magnetic field
a solenoid
an insulator
- 8. Multiple Choice
What is the difference between a galvanometer and an electric motor?
Electric motor does not require electric current
Galvanometer uses electric energy
In an electric motor, the wire spins
an electric motor uses electric energy
- 9. Multiple Choice
you can inccrease the strength of an electromaget by
Decreasing the current
Decreasing the loops
using a stronger iron (Ferro) material
winding the coils more loosely
- 10. Multiple Choice
DC Current stands for:
Direct Current
Alternating Current
Diametric Current
Induced Current
- 11. Multiple Choice
In the diagram, an electric motor is pictured. This motor works by:
The wire makes the magnets move
The magnets spin and generate electricity
The current causes the wire (Armature) to spin
the magnets take energy directly from the battery
- 12. Multiple Choice
How do Maglev trains go up to 311 MPH?
a train is pulled by a big magnet at the end of the tracks
electric motors push the train and cause it to levitate
Magnetized coils repel magnets on the train which moves it
a generator creates electricity which fuels the train
- 13. Multiple Choice
a magnetic crane picks up pieces of metal in the picture. the crane magnet is made by electrified current and a coil. Most likely, what element is the metal?
copper
steel
aluminum
iron
- 14. Multiple Choice
A magnetic pole is the part of the magnet where the magnetic field is the..
Strongest
Weakest
Most average
- 15. Multiple Choice
Electromagnetic Induction is a technical way to say that we can create a magnetic field using electricity.
True
False
- 16. Multiple Choice
A compass works because of the effect that the moon has on the earth's magnetic field.
True
False
- 17. Multiple Choice
Increasing the number of loops in a solenoid will cause its strength to increase.
True
False
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