Unfortunately the students of today, as I see them are more interested in enjoying the freedom rather than learning. And the internet unfortunately has aided in spoiling the generation - it is not only these blogs, where I see a few irresponsibly kind members answering these, but also the google helps - with proper framing the ready-made answer to the question.
The net result is - when we used to try to find an answer- either we knew the place where the answer will be found (so we had a more than cursory glance at the book) or we had to read through the chapter where it was likely to be found. Either way we used to learn a bit more than the straight answer to the question.
Now they know only the answer, and that to found without hard work, so it will be available in their RAM till the answer is submitted/next part whichever is earlier.
Please visit www.epcos.com. also you will find lot of threads in this forum regarding your question. just type capacitor and numerous threads and expert answers will be available.