Recent content by FBS

Okay, now I have: V1 = ⅓ dV2/dt + V2 dV1/dt = ⅓ d²V2/dt² + dV2/dt ~~ ⅓ dV2/dt + V2 - 5 + ½(⅓ dV2/dt + dV2/dt) + ⅓ dV2/dt = 0 ⅓ dV2/dt + V2 - 5 + 1/6 d²V2/dt² + ½ dV2/dt + ⅓ dV2/dt = 0 1/6 d²V2/dt² + 7/6 dV2/dt + V2 - 5 = 0 I wasn't sure what to do with that -5 for the...

So: (V1 - 5)/1 = 0.5 (dV1/dt) + 0.333 (dV2/dt) I tried that at first but I wasn't sure what to do with all the variables.

Then it would be 0 = 0.5 (dV1/dt) + 0.333 (dV2/dt) ? I'm not sure what you meant.

I just did a source transformation to find the current going into node V1.

Should it be this instead?: 5/1 = 0.5 (dV1/dt) + (V1 - V2)/1 I thought the current through the second resistor should be the same as through the 1/3 F capacitor...?

Homework Statement Find an expression for Vo, the voltage across the resistor. Hint: find V1 and V2 first.Homework Equations i_c = C(dV/dt) V_c = 1/C integral( i dt )The Attempt at a Solution I think at t = 0, the voltage source turns on so @ t < 0 : V1(0-) = 0 V2(0-) = 0 @ t > 0 ...

Homework Statement (See attached figure) I need to find V0 in terms of R1, R2, R3 and C.Homework Equations V0 = -RC (dVs/dt) for a differentiatorThe Attempt at a Solution I understand I have to apply KCL at the node between C and R1, and I've also determined that R1 and R2 are in series (not...

So it turns out I couldn't figure it out because I hadn't learned delta-wye conversions yet. D'oh. I was able to get the right answer by converting the three 10 ohm resistor Y to a triangle of 30 ohms which then let me parallel the two 20 ohm resistors with two 30s and then parallel the...

I think I feel more confused than ever. I'm not sure how symmetry affects the current unless you mean the current on the opposite side of the circuit should be identical? But they all seem different to me, maybe I'm not understanding some basic principle...

I am not so sure. It looks like it could be flowing in both directions. :( Would it be flowing to the right because the 20 ohm resistor "resisted" more of the current than the 10 ohm one did?

Homework Statement [PLAIN]http://img593.imageshack.us/img593/6015/251a.png Homework Equations for combining resistors in series: R1 + R2 for combining resistors in parallels: R1R2/(R1 + R2) The Attempt at a Solution I've tried redrawing the circuit many times trying to make it easier to...

Homework Statement Find the uncertainty for pi using (a) the formulas (b) calculusHomework Equations \pi = (4/D^{2})(hw - m/(PL)) Uncertainty formulas: for products and quotients: Z = XY \deltaZ/Z = \deltaX/X + \deltaY/Y for differences: Z = X - Y \deltaZ/Z = \deltaX/(|X - Y|) +...