850_Physics ProblemsTechnical Physics

850_Physics ProblemsTechnical Physics - 190 P30.8 Sources...

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190 Sources of the Magnetic Field P30.8 Along the axis of a circular loop of radius R , B IR xR = + µ 0 2 22 32 2 ej or B B 0 2 1 1 = + L N M M O Q P P bg where B I R 0 0 2 . FIG. P30.8 BB 0 0.00 1.00 1.00 0.354 2.00 0.0894 3.00 0.0316 4.00 0.0143 5.00 0.00754 *P30.9 Wire 1 creates at the origin magnetic field B 1 0 2 = π I r right hand rule = 01 2 I a = 2 I a ± j (a) If the total field at the origin is 2 2 I a I a ±± jj B =+ then the second wire must create field according to Bj 2 02 2 == I a I a ± af . Then II I 21 1 out of the paper ± k . (b) The other possibility is j jB 12 2 2 += = + I a I a . Then 2 3 2 =− = I a I a ± I 1 66 into the paper ± k *P30.10 Every element of current creates magnetic field in the same direction, into the page, at the center of the arc. The upper straight portion creates one-half of the field that an infinitely long straight wire
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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