magnitude of torque AA A rectangular loop consists of 107 closely wrapped turns
ID: 2121270 • Letter: M
Question
magnitude of torque
AA
A rectangular loop consists of 107 closely wrapped turns and has dimensions 0.400 m by 0.300 m. The loop is hinged along the y-axis, and the plane of the coil makes an angle of 30.0 degree with the x-axis (see figure below). What is the magnitude of the torque exerted on the loop by a uniform magnetic field of 0.880 T directed along the x-axis when the current in the windings has a value of 1.20 A in the direction shown? N middot m What is the expected direction of rotation of the loop? clockwise as viewed from above counterclockwise as viewed from the above The magnitude is zero.Explanation / Answer
Wire on y-axis doesn't experience any torque, as the magnetic field is perpendicular.
The force on two horizontal wires along x-z plane have the forces but in opposite direction. so no torque.
Edit:
Sorry...if we are calculating torque around y-axis the force on vertical wire away from the y-axis will result in some torque.
so torque = I * B cos30 * 0.3 = 1.2 * 0.76 * 0.3 * 0.4 * 107 = 11.56 N-m
It will rotate in clockwise direction as seen from above.
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