Copyright © 2011 InteractiveScienceLessons.com Electromagnets- 6 mini investigations Have books open to page ___ for some readings

Copyright © 2011 InteractiveScienceLessons.com

Electromagnets-6 mini investigations

Have books open to page ___ for some readings


Task: Build an electromagnet.


Good job everyone.


Wire wound evenly from top to bottom

One wire tucked in permanently. Other touches on/off.


Task 1: Find the strongest part.


Electromagnets1. The strongest part of an electromagnet is…

at the ends, just like on a bar magnet.

Read p. ___ ¶ __ together


Task 2: Disconnect the current.



at the ends, just like on a bar magnet.2. Disconnecting the electricity causes…

it to lose its magnetism.


Task 3: Wind the wire 10x more.




it to lose its magnetism.3. Winding the wire 10 more times causes…

the magnetism to become stronger.


Task 4: Reverse the current.





the magnetism to become stronger.4. When the 1.5 volt current is reversed…

nothing changes (that we can see).


Task 5: Remove the nail.






nothing changes (that we can see).5. Removing the iron core (nail) causes…

it to lose (most of) its magnetism.


Task 6: Double the current.






nothing changes (that we can see).5. Removing the iron core (nail) causes…

it to lose (most of) its magnetism.6. Doubling the electricity causes…

the magnet to become stronger.


Clean up

• Straighten the wire

• Reduce residual charge in nail by throwing it down on hard floor

• Put 4 new handouts in your box

Documents

Copyright © 2011 InteractiveScienceLessons.com Electromagnets- 6 mini investigations Have books open to page ___ for some readings