PH-306

Power transmission

Physics · Secondary 3 · Hard · Power transmission

A company wants to transmit 5.0 MW of power using overhead cables with the same resistance in both cases.

Method A: 25 kV
Method B: 250 kV

Ignoring losses in transformers, how does the power loss in the cables in Method B compare with Method A?

$\dfrac{1}{100}$ as much
$\dfrac{1}{10}$ as much
10 times as much
100 times as much

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