Detecting a Magnetic Field: Difference between revisions
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==The Main Idea== | ==The Main Idea== | ||
A compass can be used to determine the magnetic field in a wire. If a compass is not in the proximity of any iron or steel object, the compass will naturally point in the direction of the Earth's magnetic north pole. If a current carrying wire is brought near the compass, the compass needle will deflect. | A compass can be used to determine the magnetic field in a wire. If a compass is not in the proximity of any iron or steel object, the compass will naturally point in the direction of the Earth's magnetic north pole. If a current carrying wire is brought near the compass, the compass needle will deflect in the direction of the net magnetic field. | ||
===A Mathematical Model=== | ===A Mathematical Model=== | ||
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==History== | ==History== | ||
This phenomenon was discovered by Danish scientist, Hans Oersted in 1826. | This phenomenon was discovered by Danish scientist, Hans Oersted in 1826. After stumbling upon the deflection of a needle, he further investigated the | ||
== See also == | == See also == | ||
Revision as of 13:53, 11 November 2015
Short Description of Topic
The Main Idea
A compass can be used to determine the magnetic field in a wire. If a compass is not in the proximity of any iron or steel object, the compass will naturally point in the direction of the Earth's magnetic north pole. If a current carrying wire is brought near the compass, the compass needle will deflect in the direction of the net magnetic field.
A Mathematical Model
A useful attribute of a compass is that you can calculate the the magnetic field of current carrying wire when you figure out the deflection angle. This equation is: [math]\displaystyle{ B_{wire}=B_{earth} tan(\theta) }[/math] where [math]\displaystyle{ \theta }[/math] is the deflection angle, [math]\displaystyle{ B_{earth} }[/math] is the earth's magnetic field which is a constant value of 2e-5 Tesla.
A Computational Model
How do we visualize or predict using this topic. Consider embedding some vpython code here Teach hands-on with GlowScript
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History
This phenomenon was discovered by Danish scientist, Hans Oersted in 1826. After stumbling upon the deflection of a needle, he further investigated the
See also
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