That was one of the conundrums I realized and stopped reading because I'm not the sort of guy who assumes he understands what he's reading. If you can't understand what you're reading, what read ?
The webpage I cited is just another source that uses the same notations/terminology as the book...
Well, I thank you all for taking time to answer my questions. As you can see poor terminology can lead one astray ! One will end up looking for something that is really not there !
The Electrician, thanks for making things clear. This is certainly a nuanced concept that the author glossed over. One final question, when calculating the efficiency of a full wave rectified wave (assuming unfiltered) the formula used is ...
Forgive me for saying this, I don't think you understand my question. I am very aware of the fact that the "square of averages and the average of squares are not equal". No one is saying otherwise. What is confusing me is when the efficiency of the the rectifier was being calculated the author...
Thanks for the explanation. Where does ##P_{dc}## come from ? I already know that an ac source and a dc source in series will have the rectified voltage you mentioned. In my discussion, there's no dc source in the rectifier. Actually, in my original posts, I used the term ##V_{dc}## to be...
Actually the author goes into calculating the rectifier efficiency as : \frac{P_{dc}}{P_{ac}} which means that he considered ##P_{dc}## to be the actual average power delivered to the load. But everyone knows that P_{ac}=\frac{V^{2}_{rms}}{R} means by definition/derivation the average power...
I know. I'm sorry. I wanted to use the Latex feature to properly format the equations and in the process left out the division sign. I was copying and pasting the equation so the error duplicated. But that's not the point of the question! Can you tell me what the different powers mean and which...
Hello,
I am reading a book on Power Electronic and got confused on the actual interpretation of ac and dc power.
From basic circuit analysis, I already know that the average power delivered to a resistive load by a sinusoidal signal is : P_{ac} = \frac{V^{2}_{rms}}{R}.
When talking about a pure...
Hello,
I lost my HP50g calculator a week ago and have ever since been contemplating whether buying another graphing calculator makes sense. Given that most of these graphing calculators are not allowed anywhere near exam halls, I have long since stationed my calculator home. Having started using...
Yes I'm sure. Here's a pic of the question:
Why are you insisting on 2^(-2x) if you the premise 2^(2x) is always false ?? I mean the question seems to be similar to the statement: if x^2+1<0, then 1 is even. Since x^2+1<0 is always false, then the statement if x^2+1<0, then 1 is even is...
Hello,
Found a book on proofs and went to the exercise section. The proofs are fairly easy. The problem is the question I tried is listed under "direct proofs". I wasn't able to use direct proofs. Here's the question:
For all x in Z, if 2^(2x) is odd, then 2^(-2x) is odd.
My thoughts:
I thought...
The plot on the right was done on mathematica 5. I tried it myself. But mathematica 5 doesn't have all other plot functions like 3d contour plot. Why can't I get the same effect in mathematica 8?