# A coil of resistance 12 and self-inductance 2mH is connected across an ideal 12V battery. (a) Compute the time constant. (b) Sketch the current…

A coil of resistance 12Ω and self-inductance 2mH is connected across an ideal 12V battery.

(a) Compute the time constant.

(b) Sketch the current through the inductor as a function of time.

(c) How long does it take for the current in the circuit to reach 99% of its ﬁnal value?

(d) How much energy is stored in the inductor when the ﬁnal current is reached?