Have an account?
Skip to Content
Build your own quiz
Suggestions for you
15 questions
Show Answers
See Preview
- 1. 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
- 2. Multiple ChoiceLike poles on a magnetattractrepel
- 3. Multiple Choice
All iron nails will fall
some of the iron nails will fall
All the nails will remain attracted
- 4. Multiple Choice
Voltage can be induced in a wire by
moving the wire near a magnet.
moving a magnet near the wire.
changing the current in a nearby wire.
all of these
- 5. Multiple ChoiceWhat would happen if I move a bar magnet in and out of a coil of copper wire?Electric current would disappearThe magnet would explodeElectric current will flow through the wireIt would produce a gravitational field
- 6. Multiple ChoiceWhat is one way to increase the current in a wire?Decrease the number of coilsIncrease the number of coilsMove the magnet slowerTake the wire off of the magnet
- 7. Multiple Choice
A __________ is an electrical device that converts AC electricity from one voltage level to another
transformer
primary coil
secondary coil
center tap
- 8. Multiple ChoiceWill a transformer work with direct current (d.c.) or alternating current (a.c.)?a.c. onlyd.c. onlyBoth a.c. and d.c.
- 9. Multiple ChoiceIf you wrap more coils around an electromagnet, it will become...brighterstrongerweakerinvisible
- 10. Multiple Choice
If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed into a coil with twice the number of loops,
one-half as much voltage is induced.
the same voltage is induced.
twice as much voltage is induced.
four times as much voltage is induced.
- 11. Multiple ChoiceWhat will happen when these magnets are brought close together?They will attract each other.They will repel each other.Both magnets will turn to the leftBoth magnets will turn to the right
- 12. Multiple Choice
Can you produce current in a wire with a magnet that is sitting still?
Yes; having a magnet near a wire is enough to excite the electrons
No; the magnetic field has to be changing to excite the electrons
No; magnets cannot create electricity
- 13. Multiple Choice
Which pairs of materials could be used to create electromagnetic induction?
Coiled wire, a magnet
Coiled wire, a battery
A magnet, a battery
None of the above
- 14. Multiple Choice
Why is magnetic induction important?
Electromagnets are very versatile
Every electric motor uses induction
Because it's an easy way to produce electricity
All of the above
- 15. Multiple Choice
What can electromagnets do that regular magnets can't?
Switch their magnetic fields
Explode
Be turned off
They are both the same in every way
- Answer choicesTagsAnswer choicesTags