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Author Topic: resistance v. impedence  (Read 222 times)
W7ARE
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Posts: 16




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« on: April 17, 2008, 04:05:53 PM »

What is the difference between resistance and impededence?
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KB1NXL
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Posts: 7




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« Reply #1 on: April 17, 2008, 05:44:13 PM »

Simply put, resistance is the restriction of the flow of  direct current in a circuit.  its relationship to voltage is by the classic formula we all know (right?) v=ir or r=v/i. impedance is similar, only it's with alternating (AC) current.  With AC, you also have another component to deal with with respect to voltage and current, phase angle between the two.  in a purely resistive circuit, the phase angle is 0, add capacitive or inductive reactance to the mill, and you add phase differences between the two entities.  hope this helps.
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