A 20-turn rectangular coil with sides l = 15 cm and w = 5 cm is placed in the y−z plane as...

A 20-turn rectangular coil with sides l = 15 cm and w = 5 cm is placed in the y−z plane as shown in Fig. 1.

(a) If the coil, which carries a current I = 10 A, is in the presence of a magnetic flux density

 

determine the torque acting on the coil.

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(b) At what angle φ is the torque zero?

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(c) At what angle φ is the torque maximum? Determine its value.

Figure 1

Rectangular loop.