- #1
Angie K.
- 108
- 1
Homework Statement
a. What is the potential at point a with S open? (Let V = 0 at the negative terminal of the battery.)
b. What is the potential at point b with the switch open?
c. When the switch is closed, what is the final potential of point b?
d. How much charge flows through the switch S after it is closed?
2. Homework Equations
Voltage of Capacitor = Q/C
V=IR
Kirchhoff's Laws (Junction Rule and Loop Rule)
The Attempt at a Solution
I combined the two resistors so I would have one equivalent resistor and I combined the capacitors to have one equivalent capacitor.
Now, the circuit is just the voltage source, a single resistor (13.2 Ohms) and a single capacitor (0.16 microFarads)
I found the current through the resistor to be .909 Amps.
Applying Kirchhoff's Laws, I got three equations:
i1-i2-i3=0
12-13.2(i2)=0
13.2(i2)-Q/.16microF(i3)=0 --> not sure how to solve for Q since there's two unknowns here (i2 and Q)
From here, I'm not sure what I need to do.