# 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:

i_{1} = i_{2} + i_{3}

E – i_{1}R -i_{2}R = 0

i_{2}R – i_{3}R

i dont understand how they get the answer

i_{1} = 2/3(v/r)

Ive also attached the steps shown from the solution manual:

thanks for all you help

http://ift.tt/1lqi6sn

## Leave a comment