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 The Step-Response 
  of a RL Circuit (2)
 
 
 
 •   Three
 steps to find out the step response of an RL
 circuit:
  
 
 
 
 
 
 1.The initial
 inductor current i(0) at t = 0+.
 2.The final
 inductor current i(¥).
 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.
 
  
  
   
   
   
   
   
   
   
   
   
   
   
   
  
  
  
 
  
 
  
 