An inductor of negligible resistance and an inductance of 0.2 H is(adsbygoogle = window.adsbygoogle || []).push({});

connected in series with a 330 Ω resistor to a 12V d.c. supply.

Determine:

(a) the time constant of the circuit

(b) the voltage drop across the inductor after two time constants

(c) the voltage drop across the resistor after three time constants

(d) the resistance of a 0.2 H coil used to replace the inductor if the

circuit’s time constant falls to 0.55 ms.

This is the full question, I have calculated A, B, and C, however I am struggling with D, any help would be great and clarification of my current answer would be even better

(a) 0.606ms

(b) 1.62V

(c) 11.4V

(d) :'(

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# Homework Help: Inductance in DC Networks

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