Post by: vcestudent94 on November 13, 2012, 11:29:37 am
Can someone please check if my logic is correct, its urgent! thanks
Post by: wanigara on November 13, 2012, 12:02:53 pm
So we know that Ipeak = sqrt(2) Irms and Vpeak = Sqrt(2)xVrms
Therefore Ppeak = 2x Prms
and Prms = Ppeak/2
Post by: vcestudent94 on November 13, 2012, 07:46:29 pm
This might be a stupid question but is there such thing as RMS Power and Peak Power. If so do we always assume that we are given RMS power in the Exam? So to calculate Irms for example we go: Irms = Prms/Vrms OR Irms = (Ppeak/Vpeak)/sqrt(2).Can someone please clarify this? Exams tomorrow:o
Can someone please check if my logic is correct, its urgent! thanks
Post by: rife168 on November 13, 2012, 07:53:35 pm
This might be a stupid question but is there such thing as RMS Power and Peak Power. If so do we always assume that we are given RMS power in the Exam? So to calculate Irms for example we go: Irms = Prms/Vrms OR Irms = (Ppeak/Vpeak)/sqrt(2).Can someone please clarify this? Exams tomorrow:o
Can someone please check if my logic is correct, its urgent! thanks
VCAA are always specific about whether the value of AC current/voltage is RMS
It will be written as
I don't think they would just write V or I unless it was in relation to DC
Post by: vcestudent94 on November 13, 2012, 08:12:20 pm
Yes but what about power.Is there no such thing as peak Power and rms Power? Which one is the standard?This might be a stupid question but is there such thing as RMS Power and Peak Power. If so do we always assume that we are given RMS power in the Exam? So to calculate Irms for example we go: Irms = Prms/Vrms OR Irms = (Ppeak/Vpeak)/sqrt(2).Can someone please clarify this? Exams tomorrow:o
Can someone please check if my logic is correct, its urgent! thanks
VCAA are always specific about whether the value of AC current/voltage is RMS
It will be written asor
if it is the case.
I don't think they would just write V or I unless it was in relation to DC
Post by: availn on November 13, 2012, 08:21:24 pm
Yes but what about power.Is there no such thing as peak Power and rms Power? Which one is the standard?This might be a stupid question but is there such thing as RMS Power and Peak Power. If so do we always assume that we are given RMS power in the Exam? So to calculate Irms for example we go: Irms = Prms/Vrms OR Irms = (Ppeak/Vpeak)/sqrt(2).Can someone please clarify this? Exams tomorrow:o
Can someone please check if my logic is correct, its urgent! thanks
VCAA are always specific about whether the value of AC current/voltage is RMS
It will be written as
I don't think they would just write V or I unless it was in relation to DC
RMS power. Never heard of peak power anyways, sounds completely pointless, and past VCAA exams always use power from RMS values.
Post by: vcestudent94 on November 13, 2012, 08:25:18 pm