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Transformers
A transformer operates poorly at very low frequencies because _____
Primary reactance is too much increased
Permeability of core is increased
Magnetising current is abnormally high
None of the listed here
Primary reactance is too much increased
Permeability of core is increased
Magnetising current is abnormally high
None of the listed here
Answer
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Related Question
Transformers
An open-circuit test on a transformer is conducted primarily to measure
copper loss
total loss
core loss
insulation resistance
copper loss
total loss
core loss
insulation resistance
Answer
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Transformers
A no-load test is performed on a transformer to determine
efficiency
copper loss
magnetising current
core loss
magnetising current and loss
efficiency
copper loss
magnetising current
core loss
magnetising current and loss
Answer
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Transformers
The core type transformer provides _______
Lesser average length per turn
Shorter magnetic path
Much longer magnetic path
None of the listed here
Lesser average length per turn
Shorter magnetic path
Much longer magnetic path
None of the listed here
Answer
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Transformers
The main reason for generation of harmonics in a transformer could be
saturation of core
poor insulation
mechanical vibrations
fluctuating load
saturation of core
poor insulation
mechanical vibrations
fluctuating load
Answer
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Transformers
The noise produced by a transformer is termed as
ringing
zoom
buzz
hum
ringing
zoom
buzz
hum
Answer
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