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Transformers
Which of the following insulating materials can withstand the highest temperature safely?
Asbestos
Mica
Glass fibre
Cellulose
Asbestos
Mica
Glass fibre
Cellulose
Answer
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Related Question
Transformers
The flux in the core of a single phase transformer is _____
Partly alternating and partly rotating
Purely rotating one
Purely alternating one
None of the listed here
Partly alternating and partly rotating
Purely rotating one
Purely alternating one
None of the listed here
Answer
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Transformers
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is
25
0.2
0.4
5
25
0.2
0.4
5
Answer
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Transformers
The core type transformer is generally suitable for ______
High voltage and high output
High voltage and small output
Low voltage and high output
None of the listed here
High voltage and high output
High voltage and small output
Low voltage and high output
None of the listed here
Answer
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Transformers
In an auto transformer, the primary and secondary are _____ coupled.
None of the listed here
Only electrically
Only magnetically
Magnetically as well as electrically
None of the listed here
Only electrically
Only magnetically
Magnetically as well as electrically
Answer
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Transformers
The efficiencies of transformers compared with that of electric motors of the same power are
much higher
much smaller
about the same
somewhat smaller
much higher
much smaller
about the same
somewhat smaller
Answer
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