MM0704, Lesson 4
REVIEW EXERCISES
Circle the letter of the correct answer to each question.
1.
What will happen if the primary current in a transformer remains at some steady finite value?
a.
The primary field will collapse.
b.
The secondary field will collapse.
c.
The secondary induced voltage will increase to maximum.
d.
The secondary current remains at a steady finite value.
What is the normal phase difference, in O, between the primary and secondary voltages in a transformer?
2.
a.
180.
b.
120.
c.
90.
d.
60.
3.
What is the induced secondary input, in volts, of this circuit? See figure 4-27.
a.
50
b.
100.
c.
200.
d.
400.
4.
How much current, in amps, is flowing in the secondary circuit? See figure 4-27.
a.
0.
b.
2.5.
c.
5.
d.
10.
5.
What is the power, in watts, in the secondary? See figure 4-27.
a.
1,000.
b.
500.
c.
200.
d.
100.
100
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