# Search results

1. ### Question: Electromagnetism, Weak-force, Gravity, Strong Nuclear force ?

What if there was a single force particle. 1 particle that did it all.
2. ### Physics of capacitors over frequency

Well think of it this way, in a city you might have a highway with a 2-lane bridge that everyone needs to take. Eventually the cars will pile up there... kinda like the charges. Lets say traffice is not rush hour, and its going both ways. Well, then there will always be people turning around...
3. ### Electromagnets and waves

Current range is probably the current limit. Don't forget, if you pass too high of a current through a wire it will burn like a fuse or a burnt out lightbulb.
4. ### Electromagnets and waves

There are two approaches you can take: -the lego approach -the engineering approach When i say lego, i really mean to say assemble and tweak through experimentation and intuition. If you want the lego approach look for some info on crystal radios and try building an AM crystal radio...
5. ### Electromagnets and waves

Well the rule of thumb is the bigger you want your C value to be, the bigger the cap has to be. The faster the frequency the smaller the cap. Typically you'll want a tuning capacitor though. Inductors can be all kinds of shapes and sizes. I agree with Chroot, in order to build a radio...
6. ### Electromagnets and waves

Basically ya.
7. ### Electromagnets and waves

Okay in plain english: A capacitor is simply two metal plates with a substance in between. A capacitor will charge up and as it charges up less and less current will flow. An inductor resists current changes so you can change voltage really rapidly and it will maintain a relatively...
8. ### Electromagnets and waves

I haven't much of a background in electromagnetic theory yet, but as an engineer i can tell you that a rapidly changing voltage on a wire (longer than 1/2 the wavelength) will produce a radio wave. That is why AM radio towers are so large compared to something like a cell phone antenna. Are...