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- 1. Open Ended
Explain how a magnetic crane is able to lift metal scrap but also release it. State the type of magnet it is and how it functions.
- 2. Open Ended
When creating an electromagnet, what design techniques can be used to increase the strength of the magnetic force?
- 3. Open Ended
What will happen if a magnet is cut into two pieces? What will the new pieces be like?
- 4. Open Ended
You have two bar magnets. List the scenarios where the bar magnets will attract one another. Then create a list of scenarios when the bar magnets will repel one another.
- 5. Multiple Choice
When an electric charge is moving it will
generate static electricity
generate a magnetic field
become a magnet
increase in electric charge
- 6. Multiple Choice
Why does wrapping wire into a solenoid shape (coils) help increase the strength of the magnetic force?
the loops of wire spread out the magnetic field
the loops of wire increase the energy.
the loops of wire concentrate the magnetic field.
the loops of wire absorb the magnetic field.
- 7. Multiple Choice
One way to increase the strength of an electromagnet is by increasing the electric current traveling through the wire. What is another way to increase magnetic force strength?
increase the space between the coils.
make the coils square instead of tight loops.
add more coils around the solenoid.
reduce the number of coils.
- 8. Multiple Choice
True or False: The magnetic force from a magnet onto a paperclip will increase if the distance between them decreases.
True
False
- 9. Multiple Choice
With electromagnetic induction, when a magnet moves past the center of a coil of wire, an electric charge is produced. Which of the following will increase the electric charge?
using less coils
moving the magnet slower through the loop
moving the magnet faster through the loop
using a weaker magnet
- 10. Multiple Choice
A compass will
point north unless there is a stronger magnetic field closer to it.
point to the nearest magnet.
point to the nearest electromagnet.
point to north no matter what.
- 11. Multiple Choice
MRI machines are medical devices that create detailed images of a person's body. What do they do to create these images?
they use powerful magnetic fields.
they use powerful electromagnetic induction.
they use powerful x-rays.
they use powerful chemicals.
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