A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

Electrical Machines
A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

400 Amp.

320 Amp.

0.5 Amp.

800 Amp.

400 Amp.

320 Amp.

0.5 Amp.

800 Amp.

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Electrical Machines
In a 3 - ÃŽÂ¦ induction motor

power factor at starting is low as compared to that while running.

power factor at starting in the same as that while running.

power factor at starting is high as compared to that while running.

none of them.

power factor at starting is low as compared to that while running.

power factor at starting in the same as that while running.

power factor at starting is high as compared to that while running.

none of them.

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Electrical Machines
Which of the following motor is more expensive for same KW output rating ?

DC Shunt Motor

Synchronous motor.

AC single phase motor.

Induction motor.

DC Shunt Motor

Synchronous motor.

AC single phase motor.

Induction motor.

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Electrical Machines
With the increases in field excitation of a DC generator, its generated emf

increases.

decreases.

increases upto a limit and then remains almost constant.

remains constant.

increases.

decreases.

increases upto a limit and then remains almost constant.

remains constant.

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Electrical Machines
Wave winding is prefered for which of the following rating?

low current and high voltage

low current and low voltage

high current and low voltage

high current and high voltage

low current and high voltage

low current and low voltage

high current and low voltage

high current and high voltage

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Electrical Machines
The mechanical power is developed by a DC motor is maximum when

back emf is equal to applied voltage.

none of above.

back emf is equal to half of applied voltage.

back emf is equal to twice of applied voltage.

back emf is equal to applied voltage.

none of above.

back emf is equal to half of applied voltage.

back emf is equal to twice of applied voltage.

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Electrical Machines

Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

Electrical Machines In a 3 - ÃŽÂ¦ induction motor

Electrical Machines Which of the following motor is more expensive for same KW output rating ?

Electrical Machines With the increases in field excitation of a DC generator, its generated emf

Electrical Machines Wave winding is prefered for which of the following rating?

Electrical Machines The mechanical power is developed by a DC motor is maximum when

Electrical Machines
A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

Electrical Machines
In a 3 - ÃŽÂ¦ induction motor

Electrical Machines
Which of the following motor is more expensive for same KW output rating ?

Electrical Machines
With the increases in field excitation of a DC generator, its generated emf

Electrical Machines
Wave winding is prefered for which of the following rating?

Electrical Machines
The mechanical power is developed by a DC motor is maximum when