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3) A rigid circular loop has a radius of 0.20 m and is in the xy-plane. A clockwise current
I is carried by the loop, as shown. The magnitude of the magnetic moment of the loop is
0.75 A m². A uniform external magnetic field, B=0.20 T in the positive x-direction, is
present.
0.20 m
a
B = 0.20 T
->
(a) What is the current in the loop?
(b) Find the magnitude of the magnetic torque exerted on the loop.

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