An inductor and a resistor are connected in series with a battery via a switch. Initially, the switch is open. At t = 0, the switch is closed. At t = 65.8 ms, = ()(der), dE dt DEL is the rate at which energy is stored in the magnetic field and dER is the rate at which energy is dissipated in the resistor. Find the time constant of this circuit. dt dt ms where L The mutual inductance between two solenoids is 13.2 H. When the current in the first solenoid decreases from I to zero in 3.05 ms, an emf of 22.5 kV is induced in the second solenoid. What is the value of the initial current I? A If two coils placed next to one another have a mutual inductance of 4.88 mH, what voltage is induced in one when the 2.00 A current in the other is switched off in 31.5 ms? V