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Electrical Machines
A 4 pole DC generator runs at 750 rpm and generate an emf of 240 V. The armature is wave wound and has 792 conductors. If the total flux from each pole is 0.0145 Wb. What is the leakage co-efficient?
1.8.
1.2.
1.4.
1.5.
1.8.
1.2.
1.4.
1.5.
Answer
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Related Question
Electrical Machines
Which of following DC motors will have percentage increase of input current for the same percentage increase in torque?
Series.
Shunt.
Cummulative compound.
Differntical compound.
Series.
Shunt.
Cummulative compound.
Differntical compound.
Answer
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Electrical Machines
Open circuit in a transformer is prefered with
direct current
high frequency supply
rated transformer voltage
rated transformer current
direct current
high frequency supply
rated transformer voltage
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Answer
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Electrical Machines
Two windings provided on the stator of 1-phase induction motor, one main winding and the other auxiliary winding are connected
either of these depending on the design of the motor
through inductive coupling
in series
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either of these depending on the design of the motor
through inductive coupling
in series
in parallel
Answer
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Electrical Machines
DC machine is a
none of above are correct.
both are correct.
conduction machine.
convection machine.
none of above are correct.
both are correct.
conduction machine.
convection machine.
Answer
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Electrical Machines
Dummy coils are used for
reducing armature reaction.
All of these
increasing efficiency.
mechanical balancing.
reducing armature reaction.
All of these
increasing efficiency.
mechanical balancing.
Answer
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