A 5.30 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.570 T pointing up. During the course of 0.190 s, the field is changed to one of 0.350 T pointing down. What is the average induced emf in the coil?

Answer 1

Emf = RATE OF MAGNETIC FLUX CHANGE

= (Coil Area)*dB/dt

For dB/dt (the rate of B-field chnge, divide (0.57-(-0.19) T by 0.19 s