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Unformatted text preview: 2 . 4. From Ampere’s law we have the result that B= µ I/(2 π r). Solve this expression for the current. Remember that 1G = 104 T. 5. Use Ampere’s Law. The current enclosed is 1A out of the page. If you us the right hand rule you find that along the y axis, outside of the loop the field is pointing in the negative x direction. The answer is 2.5*106 T. Note that the problem said to pick the closest answer. The closest answer is 6*106 T. 6. Remember that F = ILB (where B is the field perpendicular to the direction of the current flow). In this case the perpendicular component of the B field is simply the y component. L = 22N/(7T*2A) = 1.57m....
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 Spring '08
 schuller
 Physics, Magnetic Field, Ampere, Righthand rule, right hand rule

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