A current-carrying wire in a magnetic field experiences a counter-intuitive
force that is transverse to both the wire and to the direction of the magnetic
field. With the Basic Current Balance, students can perform quantitative
investigations into the interaction between a current-carrying wire and a
magnetic field. Vary the wire length, the current, and the magnetic field, and
then measure the resulting force.
Add the Current Balance Accessory Kit, and students can also determine how the angle between the wire and the magnetic field affects the force. With this addition, all the relevant variables can be analyzed.
One to six magnets are
mounted on an iron yoke, which is placed on a
gram balance. A conductor is
suspended between the magnets. The weight
of the magnets and yoke is measured,
then a current (0-5 A) is passed
through the conductor. The change in the
reading of the balance (0-4
grams) measures the force between the conductor and
Six conductors of different lengths are provided and can be easily changed while maintaining a repeatable position with respect to the magnetic field. The magnetic field is proportional to the number of magnets used.
|Ohaus Cent-O-Gram Balance||SE-8725||
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|Base and Support Rod||ME-9355||
|Basic Digital Multimeter||SE-9786A||
|2 Meter Patch Cord Set||SE-9415A||