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Which Force Exerts A Torque About The Hinge Ab

Sandra Watson
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The 20.0 cm by 35.0 cm rectangular circuit shown in the figure (Figure 1) is hinged along side ab. It carries a clockwise 5.00 A current and is located in a uniform 1.20 T magnetic field oriented perpendicular to two of its sides, as shown.

Hinge 20.0 cm 5.00 A ak35.0cm-

a)Which force exerts a torque about the hinge ab?

b)Calculate only the force that exert the torque mentioned in part (A).

c)Use your results from part (B) to calculate the torque that the magnetic field exerts on the circuit about the hinge axis ab.

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