Question

A straight conductor between points O and P has a mass of 0.54 kg and a length of 1.5 m and carries a current of 12 A (see figure below). It is hinged at O and is placed in a plane perpendicular to a magnetic field of 3.4 T. If the conductor begins from rest, determine the angular acceleration of the conductor due to the magnetic force. Ignore the effect of the gravitational force on the conductor. (Enter the magnitude.)

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