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A rectangular coil consists of N = 170 closely wrapped turns and has dimensions a = 0.400 m and b = 0.300 m. The coil is hinged along the y axis, and its plane makes an angle 6 30.0° with the x axis (see figure below) ギ (a) What is the magnitude of the torque exerted on the coil by a uniform magnetic field B 0.530 T directed in the positive x direction when the current is I 1.20 A in the direction shown? N.m (b) If you are looking downward from the positive y direction, what is the expected direction of rotation of the coil? clockwise counterclockwise Need Help?Read It OL Master Master It

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Answer #1

τ = NBAI*sinФ

τ = 170*(0.530T)*(0.400*0.300m^2)*(1.20A)*sin60

τ = 11.236 N.m

The loop will rotate so as to align the magnetic moment with the B field.

Looking down along the y-axis,

the loop will rotate in a clockwise direction.

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