A transformer is used to step up the voltage to a power line. If the stepped-up voltage is 10 times the original value, by how much will the power loss in the line decrease?
A) more than 95%
B) between 10% and 20%
C) between 20% and 95%
D) There will be no change since the power into a transformer equals the power out.

Question

Quizplus · Accepted Answer

When voltage is stepped up, the current decreases proportionally, reducing power loss (which is proportional to the square of the current) significantly, often by more than 95%.

A Transformer Is Used to Step Up the Voltage to a Power