Small transformers, such as those used for doorbell and signal circuits, are usually very efficient.
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Q4: Air core transformers are _.
A) efficient
B) inefficient
C)
Q5: Transformers used for power distribution are wound
Q6: A(n) _ is used for installations where
Q7: If a transformer increases the voltage, it
Q8: The type of material from which the
Q10: If a transformer has a ratio of
Q11: A transformer's audible hum is a result
Q12: If a transformer's primary winding has 200
Q13: What is one method of cooling a
Q14: The efficiency of a transformer may be
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