Hi, I have a general question about resonance (specifically electrical). I have been working on a device dealing with this and I thought I might make sure I got the basics right before I continue. I have two scenarios that I'm hoping someone can help me out with:(adsbygoogle = window.adsbygoogle || []).push({});

1. There is a basic oscillator circuit (ex: a battery, coil, and tunable capacitor). The battery of course powers the oscillator circuit and keeps it going at a set frequency. Now, if there is an outside electromagnetic source that is resonating at the same frequency as the inductor coil, would this outside source add power to the oscillator since they are both in resonance with each other?

2. There is another basic oscillator setup, only this time; there is only a capacitor and a coil (no battery). Again, we have an outside electromagnetic source that we want to power the oscillator inductively. Now, assuming that this source by itself is not strong enough to excite the coil (there is no antenna, just the coil), if one wiped a magnet across the oscillator to get it moving (remembering that it is tuned to oscillate at the same frequency as the outside inductive source), would the oscillator keep oscillating at the frequency of the outside source since I have it some energy to start it going?

In essence, my question is can an oscillator be powered by a weak inductive power source if it has been pre-excited to resonate at the same frequency as the power source? I have more questions about this but I'll leave it here for now. Any help is much appreciated.

Thanks,

Jason O

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# Question about Resonance

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