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POWER LOSS confusion

  1. Mar 30, 2014 #1
    Power loss doubt: power loss = I^2 R Power loss = V^2 / R But the 2 equations are contradictory ,,, from the first equation , we can say " MORE THE RESISTANCE MORE THE POWER LOSS" from the second equation ,,, it is the other way round... Why does this happen? ( usually the 1st equation is used for power loss expression ,, but i dont know why ,, and i want to know why the second equation cant be used)
     
  2. jcsd
  3. Mar 30, 2014 #2

    Doc Al

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    Staff: Mentor

    The expressions are consistent. The first one says that the more resistance the more the power loss if the current is held fixed. Just the opposite if the voltage is held fixed.
     
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