What is the difference between phase and polarity

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Phase :  For phase to measure we require two signals, and it gives the time relationships of the signals.

Polarity :  Can be measured on a single signal. It refers to positive and negative values of a signal.So a signal can have either positive polarity or negative polarity.

Inverting the polarity means shifting the amplitude,so that positive components become negative and negative components become positive.

Sine wave are the waves which alternates from positive to negative and back to positivie,place where the voltage is zero volts is taken to be zero degrees and place where the voltage starts becoming negative is taken to be 180 degrees,when it gets back to positive again it is 360 degrees which is 0 degrees.




Phase Difference:  Difference between two sinusoidal signals of the same frequency in time or degrees and  they are referenced at the same point is known as phase difference.

In-Phase:  Two sinusoidal signals having the same frequency and no phase difference are said to be in-phase.

Out of Phase : Two sinusoidal signals having the same frequency with phase difference are said to be out -of phase. The amount by which two signals are out of phase is measured in degrees and ranges from 0 to 360.If the phase difference is 180 then the signals are in antiphase or completely out of phase.
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Phase difference can be measured only when the both signals are having the same frequency.









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