JEE Main 2022 · 28 Jul · Shift 1, Physics question 43

As shown in the figure, a metallic rod of linear density 0.45 kg m$^{-1}$ is lying horizontally on a smooth inclined plane which makes an angle of 45° with the horizontal. The minimum current flowing in the rod required to keep it stationary, when 0.15 T magnetic field is acting on it in the vertical upward direction, will be :

{Use g = 10 m/s$^2$}