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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

(1) $\frac{Blv}{R}$ clockwise

(2) $\frac{Blv}{R}$ anticlockwise

(3) $\frac{2Blv}{R}$ anticlockwise

(4) Zero