Part 3: Connecting Electricity and Magnetism
Objectives
After participating in the program Electricity and
Magnetism, Part 3, students will be able to:
| · describe how to determine the north or south pole of a magnetic object |
| · report that a current in a wire generates a magnetic field |
| · recognize that this magnetic field can be turned on and off with the current |
| · describe how the direction of this magnetic field depends on the direction of the current |
| · discuss how a magnetic field generated by a current in a coil can do work |
| · explain that an iron-containing object can be magnetized by the magnetic field from a current in a coil |
| · discover the direction of the magnetic field produced by a current in a coil |
Relevant Vocabulary
| *induced magnetism | magnetism produced in an object when it is exposed to the influence of an electric field |
| *electromagnet | an object placed inside a coil of wire that becomes a temporary magnet when a current is made to flow through the wire |
Materials Needed
(For each group)
· 1 D-cell battery with holder
· 2 hookup wires with alligator clips
· 2 permanent magnets
· coil of magnetic wire (22 gauge, about 30 cm long)
· sandpaper
· straw
· small nail (Fe-containing)
· large nail (Fe-containing)
· iron-containing wire (about 8 cm long)
· paper clips in small baggie
· string (sewing thread)
· suspension system
(For the teacher/volunteer)
· compass
Total Activity Time: 1 Hour 20 Minutes
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Disclaimer: Some of the procedures for the activities contained in the lessons have been adapted from various resources listed throughout the module.
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PDF Format |
Word Format |
This
work was supported by the Center on Polymer Interfaces and Macromolecular
Assemblies (CPIMA)
as part of the NSF Materials Science and Engineering Center program under
Grant DMR 9808677
Copyright 1996 - 2003, Leland Stanford Junior University. All rights reserved.