A metallic rod of mass per unit length 0.5 kg m^-1 is lying horizontally on a smooth inclined plane which makes an angle of 30° with the horizontal.…

A metallic rod of mass per unit length $\displaystyle 0.5 \mathrm{~kg} \mathrm{~m}^{-1}$ is lying horizontally on a smooth inclined plane which makes an angle of $\displaystyle 30$° with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction $\displaystyle 0.25$ T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is