RC Circuit Help

1. The problem statement, all variables and given/known data

In the circuit of Fig. 27-65, = 1.2 kV, C = 6.5 μF, R1 = R2 = R3 = 0.73 MΩ. With C completely uncharged, switch S is suddenly closed (at t 0). At t = 0, what are (a) current i1 in resistor 1, (b) current i2 in resistor 2, and (c) current i3 in resistor 3? At t = ∞ (that is, after many time constants), what are (d) i1, (e) i2, and (f) i3? What is the potential difference V2 across resistor 2 at (g) t = 0 and (h) t = ∞? (i) Sketch V2 versus t between these two extreme times.

3. The attempt at a solution
i have loop equations down as:
i1 = i2 + i3
E – i1R -i2R = 0
i2R – i3R

i dont understand how they get the answer
i1 = 2/3(v/r)

Ive also attached the steps shown from the solution manual:
thanks for all you help


Leave a Reply

Name *
Email *