A circuit ABCD is held perpendicular to the uniform magnetic field of $B=5\times {10}^{-2}T$extending over the region PQRS and directed into the plane of the paper. The circuit is moving out of the field at a uniform speed of $0.2 m{s}^{-1}$ for 1.5 s. During this time, the current in the $5\Omega$ resistor is