Recent content by mabster

  1. M

    Engineering Thévenin resistance when branch is 0V (RC circuit)

    Brilliant! That all makes sense to me now! Thanks heaps!
  2. M

    Engineering Thévenin resistance when branch is 0V (RC circuit)

    Thanks! What you're saying makes sense, but I'm still missing the "intuition" here (this seems so fundamental that I should already know this). My problem is that the bottom rail is electrically common, so this should be an equivalent circuit: Which to me would act like resistors in...
  3. M

    Engineering Thévenin resistance when branch is 0V (RC circuit)

    Thanks, that's a really good point phinds! That's the kind of thing that will lose marks during the exams. I'll need to curb that :) ! Much appreciated!
  4. M

    Engineering Thévenin resistance when branch is 0V (RC circuit)

    Under steady-state condition (t=\infty), the capacitor will act as an open-circuit. KCL at B: I_1=-0, so I_1=0\,\mathrm{A} KVL around right-hand loop: v_c(\infty)=I_1(100\times 10^3)=[0](100\times 10^3)=0\,\mathrm{V} I'm not sure if there's typically a differential equation argument for...
  5. M

    Engineering Thévenin resistance when branch is 0V (RC circuit)

    Homework Statement Prior to t=0, switch is in position A (for long time). Afterward, switch is in position B. We need to derive the equation for vc. Homework Equations v(t)=v(\infty)+[v(0)-v(\infty)]e^\frac{-t}{\tau} \tau=RC The Attempt at a Solution at t=0...
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