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RMS Voltage across capacitor

by xswtxoj
Tags: capacitor, voltage
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xswtxoj
#1
Apr28-09, 02:19 PM
P: 87
1. The problem statement, all variables and given/known data

The inductance is 0 in the RLC Circuit. the rms voltage across the genreator and the resistor are 45, and 24V. Wats the voltage across the capacitor?

2. Relevant equations

Vrms= Vmax/ Sq rt 2
V c = IX c ,

3. The attempt at a solution

V= I/R
I= V/R 24/45= 8/15A

C can be calculated since theres no F or L
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n.karthick
#2
May20-10, 01:04 AM
P: 241
Recall the Kirchoff's voltage law. The voltage across all elements in a loop added is zero. Here there are only three elements ( generator, resistor and capacitor). The sum of voltages across them should be zero. You know voltage across two elements. Hence it is easily to calculate the voltage across C directly.


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