Magnetic force exerted by the magnetic field on a current-carrying wire
Electric motor 2 An electric motor has a circular armature with 250 turns of radius 5.0 cm through which an 8.0-A current flows. The maximum torque exerted on the armature as it turns in a magnetic field is 1.9 N . m. Show the orientation of the armature coil in the magnetic field when this torque is exerted on it and determine the magnitude of the field.
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