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Transformers
The primary and secondary of a transformer are ______ coupled.
Electrically
None of the listed here
Electrically and magnetically
Magnetically
Electrically
None of the listed here
Electrically and magnetically
Magnetically
Answer
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Related Question
Transformers
The primary winding of a power transformer should always be
switched
fused
open
shorted
switched
fused
open
shorted
Answer
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Transformers
The maximum flux produced in the core of a transformer is ______
None of the listed here
Inversely proportional to supply frequency
Directly proportional to supply frequency
Inversely proportional to primary voltage
None of the listed here
Inversely proportional to supply frequency
Directly proportional to supply frequency
Inversely proportional to primary voltage
Answer
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Transformers
The mutual inductance when k = 0.65, L1 = 2 H, and L2 = 5 H is
8 μH
4 μH
2 mH
2 μH
8 μH
4 μH
2 mH
2 μH
Answer
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Transformers
What is the approximate efficiency of large transformers?
75%
95 %
85%
65%
75%
95 %
85%
65%
Answer
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Transformers
The maximum load that a power transformer can carry is limited by its
dielectric strength of oil
temperature rise
copper loss
voltage ratio
dielectric strength of oil
temperature rise
copper loss
voltage ratio
Answer
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