Explanation

(a) As the north pole approaches, a north pole is developed at the face, $i.e.,$ the current flows anticlockwise. Finally when it completes the oscillation, no emf is present. Now south pole approaches the other side, $i.e.,$ RHS, the current flows clockwise to repel the south pole. This means the current is anticlockwise at the LHS a before. The break occurs when the pendulum is at the extreme and momentarily stationary