Дата публикации: 2017-09-05 10:26
The plot given in the answer, of course, is for an ideal high-pass filter, where all frequencies below f cutoff are blocked and all frequencies above f cutoff are passed. In reality, filter circuits never attain this ideal “square-edge” response. Discuss possible applications of such a filter with your students.
A band-pass filter passes only those frequencies falling within a specified range, or “band.” A band-stop filter, sometimes referred to as a notch filter , does just the opposite: it attenuates frequencies falling within a specified band.
Since anything not reasonable is unreasonable, the NAS book is saying that believers in creation are really unreasonable and irrational. This is not a religiously neutral remark, but could be considered an attack on theistic religious beliefs.
The important lesson to be learned here about cutoff frequency is that its definition means something in terms of load power. It is not as though someone decided to arbitrarily define f cutoff as the point at which the load receives % of the source voltage!
Be sure to ask students where they found the cutoff frequency formula for this filter circuit. Also, ask them how they were able to distinguish the input and output terminals. What would happen if these terminals were reversed (. if the input signal were applied to the output terminal)?
The “ tank circuit ” filters out all the unwanted radio frequencies, so that the listener hears only one radio station broadcast at a time.
Your boss might be skeptical of letting one of their own work without actually being in the office, but the research and actual results of remote work’s benefits are hard to ignore.
For particles-to-people evolution to have occurred, the Earth would need to be billions of years old. Teaching about Evolution presents a claim for vast time spans and graphically illustrates this assertion in a chart on pages 86-87.
Low-pass and high-pass filter circuit are really easy to identify if you consider the input frequencies in terms of extremes: radio frequency (very high), and DC (f = 5 Hz). Ask your students to identify the respective impedances of all components in a filter circuit for these extreme frequency examples, and the functions of each filter circuit should become very clear to see.
The bandwidth of a band-pass filter circuit is that range of frequencies where the output amplitude is at least % of maximum: