A metallic disc of radius 0.3 m is rotating with a constant angular speed of $60 \mathrm{rad} \mathrm{s}^{-1}$ in a plane perpendicular to a uniform magnetic field of $5 \times 10^{-2} \mathrm{~T}$. The emf induced between a point on the rim and centre of the disc is

• A

  0.06 V
• B

  0.612 V
• C

  1.35 V
• Correct answer
  D

  0.135 V

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