## Question

###### The 20.0 cm $ imes$ 35.0 cm rectangular circuit shown in $ extbf{Fig. E27.41}$ 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. (a) Draw a clear diagram showing the direction of the force that the magnetic field exerts on each segment of the circuit ($ab$, $bc$, etc.). (b) Of the four forces you drew in part (a), decide which ones exert a torque about the hinge $ab$. Then calcu

The 20.0 cm $\times$ 35.0 cm rectangular circuit shown in $\textbf{Fig. E27.41}$ 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. (a) Draw a clear diagram showing the direction of the force that the magnetic field exerts on each segment of the circuit ($ab$, $bc$, etc.). (b) Of the four forces you drew in part (a), decide which ones exert a torque about the hinge $ab$. Then calculate only those forces that exert this torque. (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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