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Verification of Ohm's Law
1)Ohm's law : 
  
2)A rheostat is a _ ? 
  
3)A potential difference of 10V appears across the ends of a resistor when 5A of current flows through it. The resistance of the resistor is : 
  
4)The S.I. unit of resistance is : 
  
5)The graph of current I (on y-axis) Vs. potential difference V (on x-axis) is found to be a straight line. The slope of the straight line gives : 
  

  


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