The figure shows a rectangular, 50-turn coil of wire, 8 cm by 4 cm . It carries

Question

The figure shows a rectangular, 50-turn  coil of wire, 8 cm by 4 cm.  It carries a current of 0.140 A and is hinged along one long side.  It is mounted in the xy plane, at an angle of 30

The figure shows a rectangular, 50-turn  coil of wire, 8 cm by 4 cm.  It carries a current of 0.140A and is hinged along one long side.  It is mounted in the xy plane, at an angle of 30 degree to the direction of a uniform magnetic field of 0.30 T.  find the magnitude and direction of the torque acting on the coil about the hinge line. Magnitude?

Explanation / Answer

A=0.08*0.04 =3.2*10^-3 m^2

T=NIABcos(x)

T=50*0.14*3.2*10^-3*0.3*cos30

T =5.82*10^-3 N-m or 0.00582 N-m

towards negative Y direction

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