11_Chapter 19 HomeworkCH19 Magnetism

11_Chapter 19 HomeworkCH19 Magnetism - Magnetism 19.22 151...

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Magnetism 151 19.22 The magnitude of the torque is sin NBIA τ θ = , where is the angle between the field and the perpendicular to the plane of the loop. The circumference of the loop is 22 . 0 0 r m π = , so the radius is 1.00 m = r and the area is 1 m Ar == . Thus, () ( ) 32 3 1 0.800 T 17.0 10 A m sin90.0 4.33 10 N m −−  ° = ×   1 19.23 The area is ( )( ) 2 0.200 m 0.150 m 0.094 2 m Aa b ππ = 90.0 . Since the field is parallel to the plane of the loop, and the magnitude of the torque is 42 sin 8 2.00 10 T 6.00 A 0.094 2 m sin90.0 NBIA 4 9.05 10 N m = ° = ×⋅ The torque is directed to make the left-hand side of the loop move toward you and the right-hand side move away.
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This document was uploaded on 10/20/2011.

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