A step-up transformer has a ratio of one to ten. Neglecting slight losses, if 100 W of power go into the primary coil, the power coming from the secondary coil is
A) 10 W.
B) 1 W.
C) 100 W.
D) 1000 W.
E) none of these

Question

Quizplus · Accepted Answer

In an ideal transformer (neglecting losses), the power output is equal to the power input. Therefore, if 100 W of power go into the primary coil, the same amount, 100 W, comes out of the secondary coil.

A Step-Up Transformer Has a Ratio of One to Ten