L c unfortunately it is not correct to simply add

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: currents for a capacitor because of the out of phase relationships mentioned above. To find a way to use Ohm’s Law, a quantity known as the impedance Z is defined: V Z = rms I rms For a resistor, Z = R. For a capacitor or an inductor, Z can be a complicated expression that takes into account the out ­of ­phase relationship between voltage and current; however, for simple magnitudes, the following is true: 1 Capacitors: Z = Inductors: (ω = 2πf) Z = ! L !C Unfortunately, it is not correct to simply add these quantities in series or in parallel when a circuit contains R and C and L. For simple examples, the results are shown below: Vrms 1 = ZC = R 2 + 2 2 I rms !C Pavg = Vrms I rms cos!...
View Full Document

This document was uploaded on 03/26/2014.

Ask a homework question - tutors are online