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Transformers
The dielectric strength of transformer oil is expected to be
lkV
330 kV
100 kV
33 kV
lkV
330 kV
100 kV
33 kV
Answer
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Related Question
Transformers
Losses which occur in rotating electric machines and do not occur in trans formers are
hysteresis and eddy current losses
copper losses
friction and windage losses
magnetic losses
hysteresis and eddy current losses
copper losses
friction and windage losses
magnetic losses
Answer
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Transformers
The steel used for transformer core has
High silicon content
All of the listed here
High permeability
Low hysteresis loss
High silicon content
All of the listed here
High permeability
Low hysteresis loss
Answer
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Transformers
What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary?
0.4
0.96
4
9.6
0.4
0.96
4
9.6
Answer
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Transformers
In a power or distribution transformer about 10 per cent end turns are heavily insulated
None of these
to reflect the line surge and save the winding of a transformer from damage
to absorb the line surge voltage and save the winding of transformer from damage
to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
None of these
to reflect the line surge and save the winding of a transformer from damage
to absorb the line surge voltage and save the winding of transformer from damage
to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
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
1.7 V
0.85 V
0 V
1 V
1.7 V
0.85 V
0 V
1 V
Answer
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