Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: The 2.82 factor

  1. Nov 7, 2005 #1
    I know that the RMS values need to be multiplied be 1.41 to get peak values, but now we are doing an experiment with magnetic field, there is a device that produces the magnetic field and the manual says we are supposed to multiply RMS values (which this device shows) by 2.82 to get the peak values. Can you please explain how it got doubled?
  2. jcsd
  3. Nov 7, 2005 #2
    It depends specifically on the experiment and some kind of symmetry between the average value and the RMS value that gives you the factor to multiply by.

    Note that [itex] 1.41 = \sqrt{2} [/itex] and [itex] 2.82 = 2\sqrt{2}[/tex]
  4. Nov 13, 2005 #3
    Thanks, I understand now it's just for sinusoids that 1.41 or [tex] \sqrt{2}[/tex] is the factor.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook