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Transformers
A transformer has full load copper loss of 400 W. The copper loss at half full load will be _____.
400 W
200 W
100 W
None of the listed here
400 W
200 W
100 W
None of the listed here
Answer
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Related Question
Transformers
Material used for construction of transformer core is usually
Aluminium
Silicon steel
Copper
Wood
Aluminium
Silicon steel
Copper
Wood
Answer
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Transformers
The efficiency of a transformer, under heavy loads, is comparatively low because
voltage drop both in primary and secondary becomes large
copper loss becomes high in proportion to the output
iron loss is increased considerably
secondary output is much less as compared to primary input
voltage drop both in primary and secondary becomes large
copper loss becomes high in proportion to the output
iron loss is increased considerably
secondary output is much less as compared to primary input
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
somewhat smaller
about the same
much higher
much smaller
somewhat smaller
about the same
Answer
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Transformers
The mutual flux in a transformer remains constant at all loads because ______
Applied voltage and frequency are constant
Iron core is used
Leakage flux is small
Losses are small
Applied voltage and frequency are constant
Iron core is used
Leakage flux is small
Losses are small
Answer
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Transformers
In a transformer the energy is conveyed from primary to secondary
None of these
by the flux
through cooling coil
through air
None of these
by the flux
through cooling coil
through air
Answer
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