6. The flexible loop in the Figure has a radius of 12 cm and is in a magnetic field of strength 0.15 T. The loop is grasped at points A and B and stretched until its area is nearly zero. If it takes 0.20 s to close the loop, what is the magnitude of the average induced emf in it during this time? X X X X X A X X X X X X X X X X X X X X X B X X X X X