A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B, constant in time and space pointing perpendicular and into the plane of the loop exists everywhere. The current induced in the loop is :

• A

  BvL/R, clockwise

• B

  BvL/R, anticlockwise

• C

  2BvL/R, anticlockwise

• D

  zero