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ohm's Law

Ohm’s  Law:
 Ohm's  law  states  that  the  current  through  a  conductor  between  two  points  is  directly proportional  to  the  potential  difference  or  voltage  across  the  two  points,  and  inversely proportional  to  the  resistance  between  them.  
The  mathematical  equation  that  describes  this relationship  is: where  I  is  the  current  through  the  resistance  in  units  of  amperes,   V is  the  potential  difference  measured  across  the  resistance  in  units  of  volts,   and  R  is  the  resistance  of  the  conductor  in  units  of  ohms.   More  specifically,  Ohm's  law  states  that  the  R  in  this  relation  is  constant, independent  of  the  current.
         
Transformer
Servo motor

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