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Electrical Machines
Alternator operates on the principle of
electromagnetic induction.
self or mutual induction.
self induction.
mutual induction.
electromagnetic induction.
self or mutual induction.
self induction.
mutual induction.
Answer
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Related Question
Electrical Machines
Lap winding is prefered for which type of machines?
high current and low voltage
high current and high voltage
low current and low voltage
low current and high voltage
high current and low voltage
high current and high voltage
low current and low voltage
low current and high voltage
Answer
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Electrical Machines
An inverted V-curve of synchronous motor shows the variation of
All of these
supply voltage and field current at constant excitation
power factor and supply voltage during hunting
power factor and dc excitation at constant load
All of these
supply voltage and field current at constant excitation
power factor and supply voltage during hunting
power factor and dc excitation at constant load
Answer
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Electrical Machines
The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is
60 Hz.
25 Hz.
16.67 Hz.
50 Hz.
60 Hz.
25 Hz.
16.67 Hz.
50 Hz.
Answer
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Electrical Machines
Type of single phase motor having highest power factor at full load is
shaded pole type.
split phase.
capacitor start.
capacitor run.
shaded pole type.
split phase.
capacitor start.
capacitor run.
Answer
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Electrical Machines
Addition of 0.3 % to 4.5 % silicon to iron
None of these
increases the electrical resistivity of iron.
increases the hysteresis loss.
reduces the saturation magnetization.
None of these
increases the electrical resistivity of iron.
increases the hysteresis loss.
reduces the saturation magnetization.
Answer
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