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 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.