A rectangular coil (Dimension `5 cmxx2.5 cm`) with 100 turns, carrying a current of A 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. 0.38 Nm
B. 0.55 Nm
C. 0.42 Nm
D. 0.27 Nm

Answer

d

Explanation

`tau= mBsin45^(@)= N(iA)Bsin45^(@)`

`= 100 xx 3(5 xx 2.5) xx 10^(-4) xx 1 xx (1)/(sqrt(2))= 0.27 Nm`