The Flexible loop has a radius of 12 cm and is in magnetic field

The Flexible loop in 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 us area is nearly zero. If it takes 0.20 s to close the loop, what is the magnitude of the average induced cmf in it during this time?

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