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 Effective or RMS Value (2)
 
  
  
  
  
   
   
   
   
   
   
   
   
   
   
   
   
  
  
  
   
  
  
  
 
  
  
   
   
   
   
   
   
   
   
   
   
   
   
  
  
  
 
  
 
  
  
  
  
  
 
 The average power can be written in
 terms of the rms values:
 
  
 
  
  
  
  
  
 
  
  
 
  
  
  
 
 Note: If you express amplitude of a phasor source(s) in rms,
 then all the answer as
 a result of this phasor source(s) must also be in rms value.
 
 
 The rms value of a sinusoid i(t) = Imcos(wt) is given by: