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Magnetic Field - Handwritten Notes | PHYS 2110, Study notes of Physics

Material Type: Notes; Professor: Farris; Class: Calculus Based Physics I; Subject: Physics; University: Volunteer State Community College; Term: Unknown 1989;

Typology: Study notes

Pre 2010

Uploaded on 08/16/2009

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29.1(continued)
Wedefinethemagneticfieldasthemagneticforceperunit
moving (electric)charge.
Somepropertiesofthisforce:
Thisistheforceonacharge"q"movingwithavelocity vin
amagneticfield B.
Title:Mar208:03AM(1of7)
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29.1 (continued)

We define the magnetic field as the magnetic force per unit

moving (electric) charge.

Some properties of this force:

This is the force on a charge "q" moving with a velocity v in

a magnetic field B.

Units of B :

Some field strengths:

Earth's field ~

Example: Force on a wire in your house due to Earth's B?

29.3 Torque on a Current Loop in a Uniform B Field

Consider a rectangular current loop in a B field:

Sum the torques about "o."

This is the torque on the current loop in the magnetic field. Define the magnetic moment, μ , of the current loop as:

This applies to any shape of loop.

HW Ch 29, pp 918920:

P 1, 5, 9, 13, 14, 21, 23

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