ch28-p061 - e j 61. The magnetic dipole moment is = 0.60 i...

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61. The magnetic dipole moment is G µµ =− 060 080 . ± . ± ij e j , where µ = NiA = Ni π r 2 = 1(0.20 A) π (0.080 m) 2 = 4.02 × 10 –4 A·m 2 . Here i is the current in the loop, N is the number of turns, A is the area of the loop, and r is its radius. (a) The torque is G G G τµ =×= × + × × + B 025 030 06 003 0 0 8 002 5 0 8 0 018 020 024 . ± . ± . ± . ± .. ±± . ± . ± . ± . ik ji jk jki e j e j bg ej Here ±± ± ik j , ji k , ×= − ×= and ±±± jk i are used. We also use ii = 0 × . Now, we substitute the value for to obtain () 444 ˆˆˆ 9.7 10 i 7.2 10 j 8.0 10 k N m. τ −−−
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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