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Electrical Machines

Electrical Machines
Maximum power developed depends on

 reactance
 load angle
 voltage
 both 1and 2

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Electrical Machines
A short-shunt cumulatively-compounded dc generator builds up a voltage of 220 V at no load at rated speed. If it is operated as a differentially compounded generator, other things remaining the same, it would build up

 220 V
 6 V
 more than 220 V
 somewhat less than 220 V

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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

 in series
 in parallel
 either of these depending on the design of the motor
 through inductive coupling

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Electrical Machines
To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase

None of these
 supply voltage
 supply frequency
 rotor resistance

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Electrical Machines
The shaft torque of a dc motor is less than the electromagnetic torque because of

  eddy current losses.
  mechanical losses.
  ohmic losses.
  hysteresis losses.

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Electrical Machines
Stability of a synchronous motor ---------- with the increase in excitation.

 any of the above
 remains unaffected
 increases
 decreases

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