Exercise: Transformers

Questions for: Transformers

The primary of a transformer is connected to a 6 V battery. The turns ratio is 1:3 and the secondary load, RL, is 100 . The voltage across the load is
A:
0 V
B:
6 V
C:
18 V
D:
2 V
Answer: A
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A certain amplifier has 600 internal resistance looking from its output. In order to provide maximum power to a 4 speaker, what turns ratio must be used in the coupling transformer?
A:
8
B:
0.8
C:
0.08
D:
80
Answer: C
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The primary winding of a power transformer should always be
A:
open
B:
shorted
C:
switched
D:
fused
Answer: D
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The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 load. The turns ratio is 3:1. What is the secondary voltage?
A:
2 V
B:
20 V
C:
180 V
D:
18 V
Answer: B
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A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is
A:
1.7 V
B:
0.85 V
C:
1 V
D:
0 V
Answer: A
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