In an electric motor, a circular coil with 100 turns of radius 2.0 cm can rotate between the poles of a magnet. When the current through the coil is 75 mA, the maximum torque that the motor can deliver is 0.0020 N ˆ™ m.
(a) What is the strength of the magnetic field?
(b) Is the torque on the coil clockwise or counterclockwise as viewed from the front at the instant shown in the figure?

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2.0 cm ㄍ