29_Chapter 19 HomeworkCH19 Magnetism

29_Chapter 19 HomeworkCH19 Magnetism - 169 Magnetism ( ) ur...

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Magnetism 169 At point C , ( ) 120 22 2 8 I a T BB µ πµ == = while 30 24 0 BI a T π 1 and B ( 2 B . These contributions are oriented as shown in Figure 4. Observe that the horizontal components of GG cancel while their vertical components add to oppose B . The magnitude of the resultant field at C is 3 G ) () 12 sin 45 T sin 45 B =+ 3 56 T= 0 C B µµ 40 ° 19.64 (a) Since one wire repels the other, the currents must be in opposite directions . (b) Consider a free body diagram of one of the wires as shown at the right. or 0 cos8.0 y FT Σ=⇒ ° = m g cos8.0 mg T = ° 0 FF ( sin8.0 sin8.0 cos8.0 xm mg T  = ° =  °  ° or
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This document was uploaded on 10/20/2011.

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