A wire loop carrying current I is placed in the `x-y` plane as shown in the figure. If an external uniform magnetic field `vec(B)=B hat(i)` is switched on, then the torque acting on the loop is

Options

A. `iBa^(2)((pi)/(3)-(sqrt(3))/(4))hat(j)`
B. `iBa^(2)((3)/(pi)-(sqrt(3))/(4))hat(j)`
C. `iBa^(2)((pi)/(3)-(sqrt(3))/(2))hat(j)`
D. `iBa^(2)((3)/(pi)-(sqrt(3))/(2))hat(j)`

Answer

A