A rectangular coil (dimension 5cm×2.5cm) with 100 turns, carrying a current of 3A in the clockwise direction is kept centered at the origin and in the X-Z plane. A magnetic field of 1T is applied along the X-axis. If the coil is tilted through 45° about the Z-axis, then the torque on the coil is:
0.55Nm
0.27Nm
0.38Nm
0.42Nm
Solution:
Correct option is B. 0.27Nm |τ|=|M×B| τ=NI×A×B×sin 45°=0.27Nm