A conducting bar of length L is free to slide on two parallel conducting rails as shown in the figure Two resistors  R1 and  R2 are connected across the ends of the rails. There is a uniform magnetic field  B→ pointing into the page. An external agent pulls the bar to the left at a constant speed .The correct statement about the directions of induced currents  I1 and I2  flowing through R1  and  R2 respectively is: