A rigid circular loop of radius r and mass m lies in the xy-plane on a flat table and has a current I flowing in it. At this particular place the earth's magnetic field is `B=B_(x)hat(i)+B_(z)hat(k)`. The value of I, so that the loop starts tilting is

Options

A. `(mg)/( pi r sqrt(B_(x)^(2) +B_(z)^(2)))`
B. `(mg)/(pi r B_z)`
C. `(mg)/(pi rB_x)`
D. `(mg)/( pi r B_z B_x)`

Answer

C