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.

800 Amp.

0.5 Amp.

320 Amp.

400 Amp.

800 Amp.

0.5 Amp.

320 Amp.

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Electrical Machines
In shunt dc motor the direction of rotation of the motor will reversed. When

either field terminals are reversed or armature terminals are reversed.

only armature terminals are reversed.

none of above.

only field terminals are changed.

either field terminals are reversed or armature terminals are reversed.

only armature terminals are reversed.

none of above.

only field terminals are changed.

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Electrical Machines
A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be

2.7 mWb.

1.2 mWb.

3.5 mWb.

1.4 mWb.

2.7 mWb.

1.2 mWb.

3.5 mWb.

1.4 mWb.

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Electrical Machines
Which of the following motor is expensive for same Kw output rates?

AC single phase motor.

Synchronous motor.

Induction motor.

DC Shunt Motor

AC single phase motor.

Synchronous motor.

Induction motor.

DC Shunt Motor

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Electrical Machines
In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

the damper bars develop induction motor torque.

negative sequence currents are generated.

the damper bars develop induction generator torque.

the damper bars develop synchronous motor torque.

the damper bars develop induction motor torque.

negative sequence currents are generated.

the damper bars develop induction generator torque.

the damper bars develop synchronous motor torque.

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Electrical Machines
In a DC generator the emf generated by the armature is maximum when

rate of change of flux is minimum.

induced voltage is high.

shaft rotation is high.

rate of change of flux is maximum.

rate of change of flux is minimum.

induced voltage is high.

shaft rotation is high.

rate of change of flux is maximum.

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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 shunt dc motor the direction of rotation of the motor will reversed. When

Electrical Machines A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be

Electrical Machines Which of the following motor is expensive for same Kw output rates?

Electrical Machines In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

Electrical Machines In a DC generator the emf generated by the armature 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 shunt dc motor the direction of rotation of the motor will reversed. When

Electrical Machines
A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be

Electrical Machines
Which of the following motor is expensive for same Kw output rates?

Electrical Machines
In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

Electrical Machines
In a DC generator the emf generated by the armature is maximum when