A scooter is going towards east at 10m/s turns right through an angle of `90^@`. If the second remains unchanged in taking this turn.what is the change in the velocity of scooter ?

A pair of adjacent coils X and Y has a mutual inductance of 1.5 mH. If the current in the coil X changes from 0 to 10 A in 0.04 s, then calculate the average induced e.m.f in the coil Y. If the coil Y has 100 turns, then find the rate of change of flux through each turn of this coil