<Tr> <Td> </Td> <Td> = R ⟨ I (t) 2 ⟩ (\ displaystyle () = R \ left \ langle I (t) ^ (2) \ right \ rangle \, \!) (as R does not vary over time, it can be factored out) </Td> </Tr> <Tr> <Td> </Td> <Td> = I RMS 2 R (\ displaystyle () = I_ (\ text (RMS)) ^ (2) R \, \!) (by definition of RMS) </Td> </Tr> <P> So, the RMS value, I, of the function I (t) is the constant current that yields the same power dissipation as the time - averaged power dissipation of the current I (t). </P> <P> Average power can also be found using the same method that in the case of a time - varying voltage, V (t), with RMS value V, </P>

Which of the following is defined as the ratio of the peak value of a waveform to the rms value