In the circuit of the figure = 3.70 kV, C = 9.70 ?F, R1 = R2 = R3 = 0.910 M?. Wi
ID: 1903591 • Letter: I
Question
In the circuit of the figure = 3.70 kV, C = 9.70 ?F, R1 = R2 = R3 = 0.910 M?. 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 = ??
Explanation / Answer
at t= 0 , capacitor is a wire. so, current = 2.71 X10^-3 A. current in r2 = 1.35 X10^-3 A. current in r3 = 1.35 X10^-3 A at t= iinfinity, C is a circuit breaker, so, i1= 2.03X10^-3 A i2 = 2.03 X10^-3 A i3=0 potential difference across r2= a. t=0, 1228.5 V b t= infinity, 1847.3 V
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