K KWCFC Member Joined Oct 12, 2009 Messages 61 Reaction score 0 Jan 20, 2011 #1 How do i find the rms value of a sinusoidal waveform? I know RMS is equivalent to 0.707. But thats all I know I know at the minute. Just trying to get some last minute revision in!
How do i find the rms value of a sinusoidal waveform? I know RMS is equivalent to 0.707. But thats all I know I know at the minute. Just trying to get some last minute revision in!
Ash Senior Member Joined Feb 15, 2010 Messages 350 Reaction score 0 Jan 20, 2011 #2 0.707 * the peak?
ProDave Twatt ™ Supporting Member Joined Nov 28, 2009 Messages 14,720 Reaction score 891 Jan 20, 2011 #3 Well the voltage reading on just about all volt meters IS the RMS value. A harder question would be how to find the peak value, which is 1.414 times the RMS value. Just about the only instrument that gives an easier reading of peak value, rather than RMS value is an oscilloscope.
Well the voltage reading on just about all volt meters IS the RMS value. A harder question would be how to find the peak value, which is 1.414 times the RMS value. Just about the only instrument that gives an easier reading of peak value, rather than RMS value is an oscilloscope.
L Larnacaman Senior Member. Joined Oct 20, 2010 Messages 734 Reaction score 0 Jan 20, 2011 #4 ProDave, Quite a few logging types of test equipment will give direct crest values, (peak) voltage and current, along with many other values that are not normally seen on regular test kit.
ProDave, Quite a few logging types of test equipment will give direct crest values, (peak) voltage and current, along with many other values that are not normally seen on regular test kit.
K KWCFC Member Joined Oct 12, 2009 Messages 61 Reaction score 0 Jan 21, 2011 #5 Cheers for the advice guys. Didnt even come across a rms question on the exam. Passed though anyway! Thanks again.
Cheers for the advice guys. Didnt even come across a rms question on the exam. Passed though anyway! Thanks again.
m4tty Scaredy cat™ Supporting Member Joined Feb 5, 2009 Messages 5,612 Reaction score 0 Jan 21, 2011 #6 Well done mate congrats