Exercise: Transformers

Questions for: Transformers

___ occurs in a transformer when some of the primary flux lines pass through the air instead of the core.
A:
Hysteresis loss
B:
Magnetic flux leakage
C:
Winding resistance
D:
Winding capacitance
Answer: B
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A transformer turns ratio of ________ will be needed to match an output impedance of 5 komega.gif to an 8 omega.gif speaker.
A:
5:1
B:
8:1
C:
25:1
D:
625:1
Answer: C
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Making the load resistance appear the same as the source's internal resistance is called _____.
A:
maximum power transfer
B:
reflected resistance
C:
impedance matching
D:
reflected load
Answer: C
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The secondary current is _____ in the given circuit.

A:
1.9 mA
B:
7.5 mA
C:
30 mA
D:
60 mA
Answer: C
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The reflected resistance is ___ as seen by the source in the given circu.

A:
150 omega.gif
B:
300 omega.gif
C:
600 omega.gif
D:
2.4 komega.gif
Answer: D
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