1. A 200 mH inductor and a 200 Ω resistor are connected insures with a 30-V DC Power supply. What is the time constant of the circuit? What is the value of the current after 5 ms when the switch is turned on?
2. What is the self-induced emf in a 10.0 mH coil when the current in it is changing at the rate of 300 A/s?