KCET 2022 Physics Solved Paper

A metallic rod of mass unit length 0.5‌kg‌m−1 is lying horizontally on a smooth inclined plane which makes an angle of 30∘ with the horizontal. A magnetic field of strength 0.25T is acting on it in the vertical direction. When a current ' T ' is flowing through it, the rod is not allowed to slide down. The quantity of current required to keep the rod stationary is