question_answer

A rectangular coil (Dimension \[5cm\times 2.5cm)\] with 100 turns, carrying a current of 3 A in the clock-wise direction is kept centered at the origin and in the X-Z plane. A magnetic field of 1 T is applied along X-axis. If the coil is tilted through\[45{}^\circ \]about Z-axis, then the torque on the coil is : [JEE Main 9-4-2019 Morning]

A) 0.55 Nm

B) 0.27 Nm

C) 0.38 Nm

D) 0.42 Nm

Correct Answer: B

Solution :

[b]

Option [b]