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Electrical Machines
Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as
T2 ∝ P3.
T ∝ √P.
T is independent of P.
T ∝ P.
T2 ∝ P3.
T ∝ √P.
T is independent of P.
T ∝ P.
Answer
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Related Question
Electrical Machines
The output indicate on the name plate of any motor is always the
Power drawn in KW.
Power drawn in KVA.
Output power at the shaft.
Gross power.
Power drawn in KW.
Power drawn in KVA.
Output power at the shaft.
Gross power.
Answer
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Electrical Machines
With the increase in speed of a DC motor
back emf increases but line current falls.
both back emf as well as line current increase.
back emf falls and line current increases.
both back emf as well as line current fall.
back emf increases but line current falls.
both back emf as well as line current increase.
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both back emf as well as line current fall.
Answer
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Electrical Machines
Voltage regulation can be determined by which of the following?
ZPF method.
All of these
Synchronous impedance method.
MMf method.
ZPF method.
All of these
Synchronous impedance method.
MMf method.
Answer
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Electrical Machines
Exciting current of an induction motor is
equal as power transformer.
lesser than power transformer.
none of these.
higher than power transformer.
equal as power transformer.
lesser than power transformer.
none of these.
higher than power transformer.
Answer
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Electrical Machines
Which of the following DC motors has almost constant speed over their full load range?
Shunt.
Compound (cummolative).
none of these.
Series.
Shunt.
Compound (cummolative).
none of these.
Series.
Answer
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