Register to reply 
Irms, Vrms and power calculations 
Share this thread: 
#1
Apr1212, 04:43 PM

P: 1

1. The problem statement, all variables and given/known data
Basically, I need to understand how to calculate Irms and I*rms given a Vrms and an impedance Z. Example question: Given Vrms = 120 V at an angle of 30° and an impedance of Z = 10 Ω, find Irms and I*rms. 2. Relevant equations How exactly do I solve for Irms and I*rms? 3. The attempt at a solution I figure that Irms = Vrms / Z. However I am a bit confused as to the I*rms. From my notes, I would imply that I just flip the sign of the angle, but this does not seem right. My attempt: Irms = Vrms/Z = 120angle30/10angle0 = 12angle30 And for I*rms, just flip the sign of the angle: 12angle30 


#2
Apr1212, 04:59 PM

Mentor
P: 11,678




Register to reply 
Related Discussions  
Noise Power calculations  Electrical Engineering  5  
Noise Power Calculations in dB or dBm  Electrical Engineering  1  
Finding Irms in a circuit  Introductory Physics Homework  0  
AC power calculations:  Engineering, Comp Sci, & Technology Homework  1  
Power calculations  Mechanical Engineering  2 