A simple electric motor consists of a 100 turn coil 3.0cm indiameter, mounted be

Question

A simple electric motor consists of a 100 turn coil 3.0cm indiameter, mounted between the poles of a magnet that produces a0.12 T magnetic field. when a 5.0 A current flows in thecoil. A) what is its magnetic dipole moment? The answer is 0.353A.m2 B) what is the maximum torque developed by the motor?Theanswer is 0.042 N.m I need help setting up the problem! A simple electric motor consists of a 100 turn coil 3.0cm indiameter, mounted between the poles of a magnet that produces a0.12 T magnetic field. when a 5.0 A current flows in thecoil. A) what is its magnetic dipole moment? The answer is 0.353A.m2 B) what is the maximum torque developed by the motor?Theanswer is 0.042 N.m I need help setting up the problem!

Explanation / Answer

Given  B = magnetic field = 0.12 T            i = current = 5 A            N= No.of truns = 100            A= Area = d ^ 2 / 4            d= diameter = 3 cm = 0.03 m            A= 7.068 * 10 ^ -4 m ^ 2            i = current = 5 A            N= No.of truns = 100            A= Area = d ^ 2 / 4            d= diameter = 3 cm = 0.03 m            A= 7.068 * 10 ^ -4 m ^ 2 (A). Magnetic dipole moment = NiA                                              = 0.3534 ampere -m^ 2 (B). Torque = BiAN So, = 0.0424115 N m

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