Question

An electric motor is made from a loop of coil wrapped 800 times into a circle with radius 32cm. The coil is put in a magnetic field with field strength 1.3T, and given a current of 12A

What is the magnetic moment of the loop?
Am2

What is the greatest amount of torque this setup can provide?
Nm

What is the smallest amount of torque this motor can provide?
Nm

When the alignment of the coils is halfway between the alignments required for the first two parts of this problem, how much torque will it provide?
Nm

Answer 1

(1) Magnetic moment of the loop is, a(800) (12 A) | π(0.32 m)' | -3,088.3A,m2 3088 Am 2) Maximum torque acting on the loop i:s sin 90 (3,0883Am)(1.3T) sin 90* 4,014.8 N.m 4015 N.m (3) Smallest torque acting on the loop is (4) For half alignment, angle of rotati on is, 90 Tsin 45* 3,088.3A,m) (1.3T) sin 45* 2,839 N.m