A coil with a resistance of 25 Ω and an inductance of 2.5 H has a DC voltage of 100 V connected across it. Determine (a) the time constant of the circuit, (b) the initial rate of change of current,...

A coil with a resistance of 25 Ω and an inductance of 2.5 H has a DC voltage of 100 V connected across it. Determine (a) the time constant of the circuit, (b) the initial rate of change of current, (c) the circuit current 0.15 s after the voltage is applied to the coil, (d) the fnal steady state current.