simulate this circuit – Schematic created using CircuitLab
Assuming i have the circuit from above and i need to find the current through every resistor and capacitor.
the switch opens at t=0.
I can see the symmetry that on the left flank all the resistors are 2 ohm resistors while in the right flank they are all 1 ohm, but i still can't figure how to find ALL the current's that runs through each resistor and capacitor.
Any tips please?
Best Answer
Go to the "end game" when all the caps can be assumed to have charged up - what will be the current through a capacitor when the voltage is not changing across it? This you should know for the formula I = C dV/dt.
Once you have concluded correctly you should be able to see what the voltages are across all the resistors. It's not a big leap of faith (given the "special" value of the resistor ratios) to make definite argument that this state of affairs also happens right at the moment when the switch closes.
Here's another tip - think wheatstone bridge.