Lecture 15 - A sheet of current The plane of wires extents...

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A sheet of current • The plane of wires extents to ± in each direction. Define n as the number of wires/length. Each wire carries current I. • By symmetry and RHR#3, B points right above the plane and left below. • Center the rectangle, with long side length L, used as an Amperian loop as shown. Ampere’s law yields LB= nc = nI, or B= I/2, independent of the 2LB μ 0 I enc μ 0 LnI, or B μ 0 nI/2, independent of the separation from the plane.
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lanning Planning Quiz 3 will be the Friday of the week that you return from spring break. • It will cover magnetic field calculations, magnetic force phenomena, and magnetism. • HW16 will be “turned on” Saturday 3/20 to let you start etting back into practice. getting back into practice. • We will have usual reviews mid-week of your return.
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wo sheets of current Two sheets of current B u B m B b • If we call Bt, Bm, Bb the fields above, in the middle, and below the planes, respective, Ampere’s law tells us that B 0 I and B B I –B u +B b =0, -B u -B m =- μ 0 nI, and B m +B b = μ 0 nI. • Appealing to superposition arguments, the field should be big in between the planes and small above or below.
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This note was uploaded on 05/11/2010 for the course PHY 214 taught by Professor Timothybolton during the Spring '10 term at Kansas State University.

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Lecture 15 - A sheet of current The plane of wires extents...

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