Potential difference between the centre of the rod and one end of the rod due to revolution in magnetic is given by, V′‌‌=Bπr2f ‌‌=0.5π(40cm×‌
10−2m
1cm
)2(10‌rev∕s) ‌‌=0.8π Potential difference between two ends of rod due to revolution in the magnetic field is given by, V‌‌=2V′ ‌‌=2(0.8π) ‌‌=1.6πV