Posted by **Mary** on Friday, September 28, 2007 at 1:57am.

The maximum torque experienced by a coil in a 0.90 T magnetic field is 8.4 10-4 N·m. The coil is circular and consists of only one turn. The current in the coil is 3.9 A. What is the length of the wire from which the coil is made?

Please tell me if I am going in the right direction.

Torque = NIAB sin theta

8.4x10^-4 = 1 x 3.9 x (pi r^2) x 0.9 x sin theta

How do I find the value of sin theta to plug into the formula?

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