Register to reply

Reoccurring Error in RLC Series Circuit Problems.

Share this thread:
buildingblocs
#1
Nov6-13, 01:12 AM
P: 11
Hi All,

In doing some practice RLC series circuit question, I have been obtaining incorrect values for active and reactive power. The magnitudes I obtain are correct however the sign of the value is not. I have attributed this to obtaining an incorrect argument for the absolute power, or computing phasors incorrectly. I have attached an image of the reasoning behind my problem solving however I must be fundamentally wrong somewhere.
Attached Thumbnails
Question_3.png  
Phys.Org News Partner Engineering news on Phys.org
Lawsuits challenge US drone, model aircraft rules
CU-Boulder leads international unmanned aircraft testing event at Pawnee Grassland
Gesture-controlled, autonomous vehicles may be valuable helpers in logistics and trans-shipment centers
Babadag
#2
Nov14-13, 03:39 PM
P: 51
S=V.I*=(V.ejα).(I.ejβ)*= (V.ejα).(I.e − jβ)= V.I.ej(α − β) = VIcos(α − β) + j.VIsin(α − β)
I*=conjugated electric current α=θv ; β=θv-θz ;α-β=θz
Then S=V^2/Z.ejθz
Attached Thumbnails
Question_3a.jpg  


Register to reply

Related Discussions
Determining resistance of a series resistor in a simple series circuit Introductory Physics Homework 6
Laplace Error in a Circuit Engineering, Comp Sci, & Technology Homework 8
Problems with propagation of error Introductory Physics Homework 0
Circuit Problems : Series and Parallel Combination Introductory Physics Homework 11
Experts please: DC CIRCUIT (PARALLEL-SERIES CIRCUIT) QUESTION Introductory Physics Homework 3