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Transformers
Burden of a current transformer is usually expressed in
Volts
Kilowatt
Volt amperes
Amperes
Volts
Kilowatt
Volt amperes
Amperes
Answer
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Related Question
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?
4
0.96
9.6
0.4
4
0.96
9.6
0.4
Answer
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Transformers
Which of the following is the main advantage of an auto-transformer over a two winding transformer?
Saving in winding material
Eddy losses are totally eliminated
Hysteresis losses are reduced
Copper losses are negligible
Saving in winding material
Eddy losses are totally eliminated
Hysteresis losses are reduced
Copper losses are negligible
Answer
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Transformers
In the short circuit test on a transformer, we generally short circuit ______
Low voltage winding
Either low or high voltage winding
High voltage winding
None of the listed here
Low voltage winding
Either low or high voltage winding
High voltage winding
None of the listed here
Answer
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Transformers
The maximum flux produced in the core of a transformer is ______
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
None of the listed here
Answer
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Transformers
In a power or distribution transformer about 10 per cent end turns are heavily insulated
to absorb the line surge voltage and save the winding of transformer from damage
to reflect the line surge and save the winding of a transformer from damage
None of these
to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
to absorb the line surge voltage and save the winding of transformer from damage
to reflect the line surge and save the winding of a transformer from damage
None of these
to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns
Answer
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