Recent content by Lunat1c

No problem at all. I totally agree with you. Thanks for your help.

sorry I misread. ok, I agree that Zin2 would be in series with j30. But wouldn't j30+Zin2 be in parallel with -j200 then?

Ok so the Zin I get would be in series with j30 and in parallel with -j200?

Hi, I have a couple questions regarding a homework problem and would really appreciate some help. Consider the lossless 50ohm transmission line shown below, which has an LC circuit inserted at some point along the line. If I want to find the input impedance how would I approach this problem...

That is honestly what I did for the current magnitude. However, when it came to the phase I just couldn't sketch the whole thing. I simulated the circuit and the phase is just too complicated!

Consider the circuit show below, where V1 = V_{peak}sin(\omega t - 36^\circ) http://img195.imageshack.us/img195/9687/rlc.png I wish to find an expression for I in the time domain and in phasor form and then sketch the magnitude/phase vs frequency plots. I already managed to get a solution...

Ok, so let's say I have a simple half-wave rectifier like the one shown in the image below: http://img585.imageshack.us/img585/1904/unledmwc.jpg When it comes to the analysis of the circuit, during the positive cycle of the input voltage, the diode is forward biased and the output voltage...

That thought did cross my mind however there shouldn't be any 'i' ( \sqrt-1 )

Hi, Can someone please show me how the 2nd equation shown below is arrived to from the first one? http://img263.imageshack.us/img263/126/voltages.jpg I started with: V_R = \frac{\sqrt(2)E}{\pi} \Bigg[\bigg(-cos(\omega t)\bigg)_{\alpha}^{\beta} - sin(\beta)\omega...

Anyone please? I have done some additional reading about the problem but I still can't see where I could have made a mistake. The problem is that in another very similar question I also got the answer wrong by using this "method", if you can call it that.

Hi, I got a small problem which I'm not sure I'm solving correctly. A small induction motor has a short circuit current equal to 5 times the full-load current. I need to find the starting torque as a percentage of full load torque if the motor is started by a star-delta starter. It is also known...

Thank you rootX. The links you provided are very informative

I've been studying the concept of operation of DC motors and there are a couple things which I'm having trouble with. When the rotor is rotating, there will be "cutting" of flux and according to Faraday's law an emf is supposed to be generated such that it opposes the change in flux producing...

Hi, I have a couple questions regarding transformers: 1. When you're told that a particular transformer is rated at 2000kVA, is that referring to the output or to the input rating of the TX? Or is it correct to say that the apparent power on both windings will be equal to that? I view...

thanks for the input. I already have the kreyszig book. I'll certainly take a look at Nakhle Asmar book though.