Recent content by shifty101uk

Hi there, I am an E&EE undergrad in my final year. However I need some advice regarding my final 2 classes. In the last semester I took Acoustics & Audio Technology and Control, which I both really enjoyed and the exams went really well. Now I am not sure what to take for my final option. I...

hey, the answer is 4.8V i got the answer in the end and my understanding of op-amps is now pretty solid. Thanks Physforums

ok so Rx and R2 is another voltage divider, actually I have just spotted where most of my confusion lies, so this has just become so much clearer, thanks. I do still need to review nodal analysis.

This is more complicated than I need to learn for my exam, but I just see it as...If I know how to complete more complex problems my understanding can only get better

Ok, I was really tired when I made this post but I think I get your hints. Is Vo divided over R3 and R1 as they are both in series as a voltage divider? I see what you mean about iR2 = iRx but not equal to Vs/R2, would it be equal to Vs/Rx? (actually, ignore that...its a current divider between...

Ok, I've never heard of this other way but good luck

Use the Quotient rule.

1. http://img248.imageshack.us/img248/8971/opampanalysisxe2.png Assume that the op amp in the circuit shown is ideal. a.) Find the output voltage when the variable resistor Rx is set to 60k Assuming Ideal Op amp. All currents leaving nodes are negative. V+ = V- = 0 and In = Ip = 0...

ahhhh thankyou, I really should double check more often. I was nearly pulling my hair out over that!

1. i = 10te^(-5t), at what instant of time is the current maximum? first I differentiated i, using the product rule. di/dt = (10e^(-5t)) (1-5) , that's what I got after simplifying, I am pretty certain this is correct. My confusion comes in when taking natural logarithms. if ln(e(^1)) =...

So am I right in assuming the 1.6mA is not the correct answer? I am fairly sure that my calculations are correct, I will have another look. Thank you SGT for your pointers on series parallel relationships, the final cog turned this morning! Does anyone have any recommended texts that mainly...

the back of the book says 1.6mA is flowing through R3, to me doesn't seem to make any sense.

Find the total amount of current flowing through R3 in the circuit below. I mainly have doubts whether the answer given in the book is correct, to me it doesn't seem correct. Heres my attempt anyway. http://img409.imageshack.us/img409/7584/superposition2iu4.png Make VS1 a short. Rt...

Ok well I am starting to get the hang of all this now, thanks a lot for your help. Ill go back and review series parallel relationships as they seem to be my biggest weak spot at the moment.

Ok well I had another go, here's what I got Make VS2 a short Rt = R1+R2//R3+R4//R5 = 3200//2000//2200 = 790ohms (I assume this is correct). It(vs1) = 2/790 = 2.531mA Therefore IR5 = 790/2200 x 2.531mA = 908microA(is this correct? as I5 = Rt/R5 * It(vs1)). Make VS1 a short. Rt...