A positive charge q moves along the line AB, which lies in the same plane as a circular loop of conducing wire as shown in the figure. The direction of current induced in the loop is

$\mathrm{The} \mathrm{motion} \mathrm{of} \mathrm{the} \mathrm{positive} \mathrm{charge} \mathrm{can} \mathrm{be} \mathrm{treated} \mathrm{as} \mathrm{a} \mathrm{current} \mathrm{flowing} \mathrm{through} \mathrm{a} \mathrm{wire}.$

As the positive charge approaches the upward magnetic flux linked with the coil increases so according to Lenz's law induced current produce a downward magnetic field so clockwise current will flow. When the same charge goes away upward flux decreases hence current flow in opposite direction.