A boat is moving due east in a region where the earth's magnetic field is $5.0 \times 10^{-5} \mathrm{NA}^{-1} \mathrm{~m}^{-1}$ due north and horizontal. The boat carries a vertical aerial $2 \mathrm{~m}$ long. If the speed of the boat is $1.50 \mathrm{~ms}^{-1}$, the magnitude of the induced emf in the wire of aerial is :

• A

  $0.75 \mathrm{mV}$
• B

  $0.50 \mathrm{mV}$
• Correct answer
  C

  $0.15 \mathrm{mV}$
• D

  $1 \mathrm{mV}$

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