0.300 mm diameter copper wire makes up a 5.4 .0 turns. 7.20 cm diameter coll There is a magnetic feld parallel to the axis of the coil. If the induced current in the coll is 6.40 A. what is the rate of hange of the magnetic field?
4.62×10^2T/5
85.5 T/5
0.356 T/s
6.19×10^−6 T/s