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POWER LOSS confusion

by K Dhiraj Bhak
Tags: confusion, loss, power
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K Dhiraj Bhak
#1
Mar30-14, 08:26 AM
P: 13
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)
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Doc Al
#2
Mar30-14, 08:53 AM
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Quote Quote by K Dhiraj Bhak View Post
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)
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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