A rectangular coil (Dimension `5 cmxx2.5 cm`) with 100 turns, carrying a current of 3A in 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^(@)` about Z-axis, then the torque on the coil is :

Options

A. 0.27 Nm
B. 0.38 Nm
C. 0.55 Nm
D. 0.42 Nm

Answer

A

Explanation

`tau=mu B sin theta=(n I A)B sin theta =100xx3xx(5xx2.5)/(100xx100)xx1xx1/(sqrt(2))=0.265N~~0.27N`