A electric circuit is made of a resistance, a solenoid and a power source.
Resistance, V= Ri
Solenoid, V = L (di/dt)
Power source, tension E(t)
Hence, L(di/dt)+ Ri = E(t). If E(t)= 20sin(5t), if L= 4 henrys and R= 20 ohms. If the intensity equals 0 at the beginning, find the amperage of...