Recent content by sammyqw

Homework Statement Find Vc(0) Homework Equations Nodal Eq , ohms law The Attempt at a Solution Can someone please check my work for Vc(0)? I'll appreciate it.

Homework Statement Find total Resistance Homework Equations 1/Req= (1/R1)+(1/R2)... The Attempt at a Solution Can someone please explain me how 5 ohm R and 3ohm R are in series and then in parallel with the 2ohm R? Thanks

Can I do i=10/25 = 0.4A then find Vo= (0.4)20 =8V and then just replace it in my equation 2?

it would be some current i = Vo/20 ?

Homework Statement Find Vc(0) Homework Equations Nodal analysis The Attempt at a Solution

Can I replace Vo with V-10/25 ?

Homework Statement find Vc(0) Homework Equations Node analysis , ohms law The Attempt at a Solution Hi, I'm trying to find Vc(0). I used node analysis but I'm stuck in eq 1. I'll appreciate if someone can give me some suggestions. Thanks

Is there any other way to find the same answer that you may know? Thanks for your help.

Homework Statement 2. Homework Equations [/B] KCL, Node Analysis , Mesh Currents The Attempt at a Solution Hi, in part b when t>0 the capacitor is replaced by an open circuit , however in part c the capacitor is replaced by a short circuit why is that?Aren't inductors the only ones...

I was referring to these two circled resistors, don't they have the same voltage because they are in parallel? I found the io using current divider io=(40/50)(8e^-250t), then use that io to find vo with ohms law.

for some reason it wouldn't let me upload pictures from imgur. it works with postimg though :D I will use that method from now on.

and that 10ohm resistor in the far left should have the same voltage as the 40ohm resistor correct?

I think I got it. I did Current divider io= 40/40+10 (8e^-250t) . I got 6.4e^-250t Amps then using Ohms law with the 10ohm resistor I got 64e^-250t V can someone confirm it please?

Homework Statement http://imgur.com/ZKiCbbA http://imgur.com/a/ccGTV Could someone explain me what happened in the step that is circled in red please? I would appreciate it. did they multiply i0x(iL)? Homework Equations they got iL by using iL=iL(initial)*e^-t/Tau . How did they get Vo? what...

yeah it makes sense now thanks. For part d i got 10e^-2000t Amps ,how can I find part e?