A Rigid Rectangular Loop,which Measures 0

question 12

Multiple Choice

A rigid rectangular loop,which measures 0.30 m by 0.40 m,carries a current of 5.5 A,as shown in the figure.A uniform external magnetic field of magnitude 2.9 T in the negative x direction is present.Segment CD is in the xz-plane and forms a 35° angle with the z-axis,as shown.Find the magnitude of the external torque needed to keep the loop in static equilibrium.

• A) 1.1 N • m
• B) 0.73 N • m
• C) 1.3 N • m
• D) 1.4 N • m
• E) 1.6 N • m

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