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Transformers
In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?
111.5 W
0 W
1,020 W
14.1 W
111.5 W
0 W
1,020 W
14.1 W
Answer
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Related Question
Transformers
Transformer breaths in when
load on it increases
None of these
load remains constant
load on it decreases
load on it increases
None of these
load remains constant
load on it decreases
Answer
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Transformers
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is
12 V
240 V
2,400 V
120 V
12 V
240 V
2,400 V
120 V
Answer
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Transformers
In which of the following transformer part of primary winding also serves as the secondary winding?
Step-up transformer
Potential transformer
Auto transformer
Current transformer
Step-up transformer
Potential transformer
Auto transformer
Current transformer
Answer
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Transformers
If a power transformer is operated at very high frequencies, then ______
Core losses will be excessive
None of the listed here
Primary reactance is too much increased
Primary will draw large power
Core losses will be excessive
None of the listed here
Primary reactance is too much increased
Primary will draw large power
Answer
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Transformers
The primary winding of a power transformer should always be
shorted
open
switched
fused
shorted
open
switched
fused
Answer
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