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

• A

  $14.76 \mathrm{A}$
• B

  $5.98 \mathrm{A}$
• C

  $7.14 \mathrm{A}$
• Correct answer
  D

  $11.32 \mathrm{A}$

Hence, the correct answer is option: 'D'.