Question
A magnetic field increases from 0 to 0.09 T in 3.0 s. How many turns of wire are needed in a circular coil 20 cm in diameter to produce an induced emf of 7.5 V? Please help soon.
Answers
bobpursley
dB/dt=.09/3
E=n*area*dB/dt
E=n*area*dB/dt