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basic electricity
ortho foundations exam 1 material
| Question | Answer |
|---|---|
| movement of electrodes | electrical current |
| rate of current flow | ampere |
| 1 coulomb = | 6.25 x 10^18 electrons |
| force that results when there is a difference in electron population between 2 points | voltage |
| unit of voltage | volts(amount of work required to move 1 coulomb) |
| material that permits free electron movement | conductors |
| materials that resist electron movement | insulators |
| measure of resistance or electrical impedance | ohm |
| pump strength / pipe characteristics | water flow |
| voltage / resistance = | electron current flow |
| ohm's law | V = A / R |
| if resistance goes up, | current flow decreases |
| components of a circuit are end to end | series circuit |
| components are side by side | parallel circuit |
| _____are the path of least resistance in the body | nerves |
| current flows through body in _____ | series AND parallel |
| if higher frequency, going to be more likely to | have more muscles to contract |
| *characteristics of a waveform | shape, direction, amplitude, duration |
| *waveform shapes | sinusoidal, rectangular, square, spiked |
| *waveform direction | positive or negative |
| positive pad is what color | red |
| negative pad is what color | black |
| more than 2 waveforms together, derived in bursts | polyphasic sinus wave |
| for strengthening, you need a pulse duration of at least 500. The phase duration is set to ___ | HALF- 250 |
| ______ prevents accommodation | modulation |
Created by:
thomask9
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