An emf of 25.0 mV is induced in a 500-turn coil when the current is changing at the rate of 10.0 A/s. What is the magnetic flux through each turn of the coil at an instant when the current is 4.00 A?
(a) 20 T.m
(b) 10 ut.m
(c) 15 ut.m
(d) 30 uТ.m