(C)Elemental 3-21 Transformers

Question 1

A capacitor is sometimes placed in series with the primary of a power transformers to

Answer 1

improves the power factor

Question 2

A transformers used to step up its input voltage must have:

Answer 2

more turns on its secondary than on its primary

Question 3

A transformers primary of 2250 turns connected to 120 VAC will develop what voltage across a 500-turn secondary?

Answer 3

26.7

Question 4

What is the ratio of the output frequency to the input frequency of a single phase full wave rectifier?

Answer 4

2:1

Question 5

A power transformer has a single primary winding and three secondary windings producing 5.0 volts, 12.6 volts, and 150 volts. Assuming similar wire sizes, which of the three secondary windings will have the highest measured DC resistance?

Answer 5

150 volt wind winding

Question 6

power transformer has a primary winding of 200 turns of #24 wire and a secondary winding consisting of 500 turns of the same size wire. When 20 volts are applied to the primary winding, the expected secondary voltage will be:

Answer 6

50 volts