Magadh Express takes 16 hours to cover the distance of 960 km between Patna and Gaziabad. The rails are separated by 130 cm and the vertical component of the earth's magnetic field is 40x10 T. (a) Find the average emf induced across the width of the train. (b) If the leakage resistance between the rails is 100 92, find the retarding force on the train due to the magnetic field.