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.

0.5 Amp.

800 Amp.

320 Amp.

400 Amp.

0.5 Amp.

800 Amp.

320 Amp.

400 Amp.

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Electrical Machines
The slip of an induction motor normally does not depend on

rotor speed.

core loss component.

shaft torque.

synchronous speed.

rotor speed.

core loss component.

shaft torque.

synchronous speed.

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Electrical Machines
The introduction of interpoles in between the main poles improves the performance of a dc machine, because

the flux waveform is improved with reduction in harmonics

the inequality of air-gap flux on the top and bottom halves of the armature is removed

the interpoles produce additional flux to augment the developed torque

a counter-emf is induced in the coil undergoing commutation

the flux waveform is improved with reduction in harmonics

the inequality of air-gap flux on the top and bottom halves of the armature is removed

the interpoles produce additional flux to augment the developed torque

a counter-emf is induced in the coil undergoing commutation

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Electrical Machines
DC machine is a

convection machine.

conduction machine.

none of above are correct.

both are correct.

convection machine.

conduction machine.

none of above are correct.

both are correct.

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Electrical Machines
Armature resistance control method is used for the _______ ?

both 1 and 2

None of these

below rated speed

above rated speed

both 1 and 2

None of these

below rated speed

above rated speed

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Electrical Machines
For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A.

280 V.

220 V.

240 V.

150 V.

280 V.

220 V.

240 V.

150 V.

ANSWER DOWNLOAD EXAMIANS APP

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 The slip of an induction motor normally does not depend on

Electrical Machines The introduction of interpoles in between the main poles improves the performance of a dc machine, because

Electrical Machines DC machine is a

Electrical Machines Armature resistance control method is used for the _______ ?

Electrical Machines For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A.

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
The slip of an induction motor normally does not depend on

Electrical Machines
The introduction of interpoles in between the main poles improves the performance of a dc machine, because

Electrical Machines
DC machine is a

Electrical Machines
Armature resistance control method is used for the _______ ?

Electrical Machines
For 250 volt DC Shunt Motor the armature and field resistance are 0.5 ohm and 250 ohm respectively. What will be the back e.m.f. produced when it takes a load current of 21A.