ELECTRICAL RESISTANCE

Electrical Reisistance is measured and calculated as follows:



 Formula:
           ƒÎD2        1       E
    R =  -------- x  ----- x -----
             4         L       I


 where,
   
    R: Electrical Resistance (ohm cm) of Carbon Rod

    D: Diameter (cm) of Carbon Rod
 
    L: Distance (cm) between two Contact points of
       Millivolt Meter 

    E: Voltage (mV) read on Millivolt Meter

    I: Current Intensity (A) on Ammeter

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