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Transformers
The power transformer is a constant
Main flux device
Voltage device
Current device
Power device
Main flux device
Voltage device
Current device
Power device
Answer
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Related Question
Transformers
A tap changer is used on a transformer for
None of the listed here
Adjustments in secondary voltage
Adjustment in primary voltage
Adjustment in both primary and secondary
None of the listed here
Adjustments in secondary voltage
Adjustment in primary voltage
Adjustment in both primary and secondary
Answer
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Transformers
A transformer operates poorly at very low frequencies because _____
Permeability of core is increased
None of the listed here
Primary reactance is too much increased
Magnetising current is abnormally high
Permeability of core is increased
None of the listed here
Primary reactance is too much increased
Magnetising current is abnormally high
Answer
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Transformers
The winding of the transformer with greater number of turns will be _____
Low voltage winding
Either high or low voltage winding
High voltage winding
None of the listed here
Low voltage winding
Either high or low voltage winding
High voltage winding
None of the listed here
Answer
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Transformers
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
1 V
1.7 V
0 V
0.85 V
1 V
1.7 V
0 V
0.85 V
Answer
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Transformers
The noise resulting from vibrations of laminations set by magnetic forces, is termed as
Boo
Zoom
Magnetostriction
Hum
Boo
Zoom
Magnetostriction
Hum
Answer
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