Then there was root-mean-square (RMS) voltage. For those nice sine waves, you took the peak voltage and divided by the square root of two, 1.414 or so. You know that kid in the front of the class?

Then there was root-mean-square (RMS) voltage. For those nice sine waves, you took the peak voltage and divided by the square root of two, 1.414 or so. You know that kid in the front of the class?

One key parameter derived from the two values mentioned above is crest factor, which is the ratio of the peak value to the root-mean-square (rms) value of a waveform. This is expressed by the equation ...

For Higher Physics revise how to determine peak voltage and frequency from oscilloscope screenshots. Revise the calculation of r.m.s. and peak values.

Typically, a unit’s peak power handling is double the RMS power handling, which basically means that the above products are actually rated the same: 150 W peak/75 W RMS.