Which invention uses the creation of electricity from
a magnet?
a. A microphone
b. A generator
c. A galvanometer
d. A motor
e. None of the above.


2. What are the opposite ends of a magnet called?
a. Its terminals
b. Its north and south poles
c. Its magnetic fields
d. Its electromagnetic poles
e. None of the above


3. How are electrical charges and magnetic poles similar?
a. Unlike attract and the same type repel
b. Both are plus and minus
c. Magnetic poles attract electrons
d. Both change positive to negative charges
e. None of the above


4. What can iron filings sprinkled on a piece of paper show you?
a. That current can flow through the filings
b. That paper distorts magnetism
c. That magnetic fields are counter clockwise
d. The pattern of a magnetic force field
e. None of the above


5. How can you show that electricity creates a magnetic field?
a. Use a compass near a wire with current
flowing through it
b. Only magnets create magnetic fields
c. Move a wire through a magnetic field
d. Connect a battery to the magnetic field
e. None of the above




6. How do you make an electromagnet?
a. Attach a natural magnet to a battery
b. Run current through a wire wrapped around
an iron rod
c. Line up the N and S poles of a magnet with
an electric wire
d. Wrap a magnet around a piece of wire with
current flowing through it.
e. None of the above


7. What happens when you turn off the current in an
electromagnet?
a. The magnetism is turned off
b. The current keeps flowing because of the
magnetic force
c. The electromagnet reverses its polarity
d. The electromagnet becomes a generator
e. None of the above


8. How can you create electricity with a magnet?
a. Attach a magnet to a battery
b. By putting a current through a wire around
a magnet
c. By moving a wire through a magnetic field
d. You can't, because only friction on electric
charges creates electricity
e. None of the above






9. Can you create electricity with a magnet?
a. No, because only friction on electric
charges or batteries create electricity.
b. Yes, by moving a wire through a magnetic
field
c. Yes, by putting a current through a wire
around a magnet
d. Yes because magnets use electricity
to stay effective
e. None of the above.