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 The Step-Response 
  of a RC Circuit (3)
 
 
 
 •  Three steps to find out the step
 response of an RC circuit:
  
 
 
 
 
 
 1.The initial
 capacitor voltage v(0).
 2.The final
 capacitor voltage v(¥) — DC voltage
 across C.
 3.The time
 constant t. 
  
 
  
  
   
   
   
   
   
   
   
   
   
   
   
   
  
  
  
 
  
 
  
  
  
  
 
  
  
  
 
 Note: The above method is a short-cut method. You may also determine
 the solution by setting up the circuit formula directly using KCL, KVL , ohms law, capacitor and inductor
 VI laws.