A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding? A. 4.73 B. 0.4 V C. 24 V D. 600 V E. None of the above

The correct answer is $\boxed{\text{C}}$.

The turns ratio is the ratio of the number of turns in the primary winding to the number of turns in the secondary winding. In this case, the turns ratio is 5. This means that for every 5 turns in the primary winding, there is 1 turn in

The voltage across the secondary winding is proportional to the number of turns in the secondary winding. So, if we apply 120 V to the primary winding, which has 5 turns, the voltage across the secondary winding, which has 1 turn, will be 120/5 = 24 V.

Option A is incorrect because 4.73 V is not the voltage across the secondary winding.

Option B is incorrect because 0.4 V is not the voltage across the secondary winding.

Option D is incorrect because 600 V is not the voltage across the secondary winding.

Option E is incorrect because there is a correct answer.