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# Polarity

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### Polarity

1. 1. Simple Waveform Polarity and Interaction
2. 2. the signal is bi-polar (it oscillates between positive and negative values) a simple sine wave
3. 3. Polarity <ul><li>the property of being polar (having positive and negative values) </li></ul><ul><li>the relationship between the positive and negative portions of two waves </li></ul>
4. 4. same polarity <ul><li>these two signals have the same polarity </li></ul><ul><li>when one is positive, the other is also positive </li></ul><ul><li>when one is negative, the other is also negative </li></ul>
5. 5. different signals - same polarity <ul><li>these two signals are different, but they have the same polarity </li></ul><ul><li>when one is positive, the other is also positive </li></ul><ul><li>when one is negative, the other is also negative </li></ul>
6. 6. opposite polarity <ul><li>these two signals have opposite polarity </li></ul><ul><li>when one is positive, the other is negative </li></ul><ul><li>when one is negative, the other is positive </li></ul>
7. 7. What happens when two identical signals are combined (added together)?
8. 8. same polarity addition <ul><li>these two signals have the same polarity </li></ul><ul><li>when they are combined (added together)... </li></ul>
9. 9. the amplitude doubles =
10. 10. What happens when two signals with opposite polarity are combined (added together)?
11. 11. opposite polarity addition <ul><li>these two signals have opposite polarity </li></ul><ul><li>when they are combined (added together)... </li></ul>
12. 12. the waveforms cancel each other out =