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21/07/2021 7:42 pm
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If the potential difference between the end of a wire of fixed resistance is doubled, by how much does the electric power increase?
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21/07/2021 7:45 pm
P = V2/R
R is fixed.
V becomes double.
Now, P = (2V)2/R
= 4V2/R
So, the electric power becomes four times its previous value.