An aeroplane in which the distance between the tips of wings is 50 m is flying horizontally with a speed of 360 km/hr over a place where the vertical components of earth magnetic field is  $2.0\times {10}^{-4}\mathrm{weber}/{\mathrm{m}}^2$. The potential difference between the tips of wings would be

• A

  0.1 V

• B

  1.0 V

• C

  0.2 V

• D

  0.01 V