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Transformers
In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be
Ns
s.N.
(Ns-l)s
(l-s)Ns
Ns
s.N.
(Ns-l)s
(l-s)Ns
Answer
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Related Question
Transformers
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is
5
0.4
25
0.2
5
0.4
25
0.2
Answer
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Transformers
The primary and secondary of a transformer are ______ coupled.
Electrically
Electrically and magnetically
Magnetically
None of the listed here
Electrically
Electrically and magnetically
Magnetically
None of the listed here
Answer
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Transformers
Noise level test in a transformer is a
None of these
routine test
special test
type test
None of these
routine test
special test
type test
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
When the secondary of a transformer is short circuited, the primary inductance _______
None of the listed here
Is decreased
Is increased
Remians unchanged
None of the listed here
Is decreased
Is increased
Remians unchanged
Answer
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