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- 1. Multiple ChoiceAs electrons move, they makeA. electromagnetism.B. auroras.C. ferromagnetism.D. magnetic fields.
- 2. Multiple Choice
This picture best illustrates the construction of a(n)
magnet
electromagnet
series circuit
parallel circuit
- 3. Multiple ChoiceHow do you make an electromagnet stronger?Add a motor and/or lightbulbsAdd more light bulbs and/or wire coilsadd more wire coils and/or a switchadd more wire coils and/or batteries
- 4. Multiple Choice
What would happen with the magnets in the picture above?
They would repel
Nothing
They would attract
They would repel and then attract
- 5. Multiple Choice
The strongest parts of the magnet are ...
fronts
backs
poles
middle
- 6. Multiple ChoiceTrue or False: All metals stick to magnets.TrueFalse
- 7. Multiple Choice
Why does the compass needle move at different locations?
Because the needle is attracted to the magnetic field produced by the magnet
Because north is up
Because it is being attracted to the Magnetic North Pole
Because north is down
- 8. Multiple Choice
A _______________ is a current-carrying coil of wire with many loops.
magnet
electromagnet
solenoid
compass
- 9. Multiple Choice
How can a magnet be used to produce an electric current?
Hold a magnet next to a piece of wire.
Wrap wire around a magnet.
Spin the magnet around inside a coil of wire.
- 10. Multiple Choice
What happens if you cut a magnet in half?
Nothing
The magnets repel
There will be two magnets
- 11. Multiple ChoiceThis is a picture of a simple electromagnet. How can the electromagnet be made stronger?Add more coils of wire to the nail.Use a smaller battery.Reverse the poles of the magnet.Remove all the coils and the nail.
- 12. Multiple Choice
What happens to the strength of a magnet if you cut a magnet in half?
the strength does not change
the strength is doubled
the strength is cut in half
doing this destroys the magent
- 13. Multiple Choice
A magnetic force acting on a beam of electrons can change
only the direction of the beam
only the energy of the beam
both the direction and the energy of the beam
neither the direction nor the energy of the beam
- 14. Multiple Choice
A magnetic force cannot act on an electron when it
is at rest
is moving parallel to magnetic field lines
both of the above
- 15. Multiple Choice
A charge carrying wire creates a magnetic field that _______________
forms circles around the wire
forms a spiral around the wire
forms a square around the wire
- 16. Multiple Choice
The reason that an electron moving in a magnetic field doesn't pick up speed is
the magnetic force is always perpendicular to the direction of motion
magnets cannot change the direction of a particle
only electric fields can change the motion of a particle
- 17. Multiple Choice
The magnetic force on a moving charged particle can change the particle's
speed
direction
both
neither
- 18. Multiple Choice
A motor and a generator are
similar devices
very different devices with different applications
forms of transformers
energy sources
- Answer choicesTagsAnswer choicesTags