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Transformers
Short circuit test on transformers is conducted to determine
copper losses
eddy current losses
core losses
hysteresis losses
copper losses
eddy current losses
core losses
hysteresis losses
Answer
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Related Question
Transformers
An open-circuit test on a transformer is conducted primarily to measure
insulation resistance
copper loss
core loss
total loss
insulation resistance
copper loss
core loss
total loss
Answer
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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-l)s
s.N.
(l-s)Ns
Ns
(Ns-l)s
s.N.
(l-s)Ns
Ns
Answer
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Transformers
A transformer does not posses ______changing property.
Current
Power
Impedance
Voltage
Current
Power
Impedance
Voltage
Answer
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Transformers
Leakage flux in a transformer occurs because
Iron core has high permeability
Transformer is not an efficient device
Applied voltage is sinusoidal
Air is not a good magnetic insulator
Iron core has high permeability
Transformer is not an efficient device
Applied voltage is sinusoidal
Air is not a good magnetic insulator
Answer
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Transformers
The efficiencies of transformers compared with that of electric motors of the same power are
much smaller
somewhat smaller
about the same
much higher
much smaller
somewhat smaller
about the same
much higher
Answer
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