 #1
Drakkith
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Homework Statement
Find ##i(0^+) ## and ##i(t), t≥0^+##
Homework Equations
The Attempt at a Solution
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I'm having trouble finding the current through this capacitor. I tried using a KVL loop for ##t=0^+##, but I'm doing it incorrectly or something.
Earlier in the problem I found: ##v_c(0^+) = 120 V##
Sign convention for resistors: Positive on the top for the 150k resistor, positive on the right side for the other 2.
KVL1: Starting at node ##b## and moving clockwise with current ##i_1## :
##2.5ki_1+150k(i_1i_2)v_c=0##
##2.5ki_1+150ki_1150ki_2(120)=0##
##147.5ki_1150ki_2=120##
KVL2: Starting just to the left of the 50k resistor and moving clockwise:
##50ki_2+200150k(i_2i_1)=0##
##50ki_2150ki_2+150ki_1=200##
##150ki_1200ki_2=200##
Solving, I get:
##i_1=0.85 mA##
##i_2=1.6mA##
##i=i_1=0.85 mA##
However, this is appears to be incorrect.
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