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2 differences between resistance,raectance and impedance?

Asked by Lekha 27th February 2013, 6:05 AM
Answered by Expert
Resistance is when voltage & current stay in phase, and it follows basic Ohms law.

Reactance is when Voltage & current are 90deg out of phase(in capacitive /inductive ckt). Depending on whether it is +90 (lead) or -90 (lag) it is called an inductive reactance or capacitive reactance. Reactance is normally denoted by the imaginary operator 'j'

Impedance is a combination of both of the above. It is usually rep as a complex number like 2 - j3.5.
The phase angle between V & I could be any value.
Answered by Expert 27th February 2013, 12:22 PM
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