Transcript How does and electromagnet work?

How Does An
Electromagnet Work?
4. Try it and record your observations.
The electromagnet still works (temporarily)
when one wire is disconnected.
5. Where is the electromagnet the strongest?
The poles
6. What can you infer about the poles at the ends of
the nails?
The poles are oppositely charged, North and
South on an electromagnet.
7. Predict what will happen if you reverse the
connections to the battery and repeat step #6.
Reversing the direction of the current flow
reverses the polarity of the electromagnet
8. Remove the coil. Experiment to compare the
magnetic strength of the empty coil with that of the
coil containing the nail.
An empty coil of current carrying wire is a
magnet, but it is not as strong. The current
carrying wire creates the magnetic field.
9. Predict what will happen to the strength
of the electromagnet if two nails are placed
inside the coil of wire. The strength of the
magnet increases.
10. Hypothesis ways to increase the strength of
your electromagnet.
11. Increase the number of coils or using two
batteries can increase the strength.
12. What are some advantage that an electromagnet has
over a regular magnet?
It can be turned on and off, the polarity can
be reversed, and the strength can be
increased or decreased.
13. Apply what you have learned to think of at least
one special use for an electromagnet.
It could sort through metallic versus nonmetallic items. Since it can be turned on and
off , it can pick things up and release them.