A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

474 V

240 V

234 V

6 V

474 V

240 V

234 V

6 V

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Electrical Machines
In travelling cranes for crane travel, trolley and boom hoist which motor is preferred?

Slip ring induction motor.

Synchronous motor.

DC differential compound motor.

Stepper motor.

Slip ring induction motor.

Synchronous motor.

DC differential compound motor.

Stepper motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 ÃŽÂ©. Then the effective rotor resistance in the backward branch of the equivalent circuit will be

2 ÃŽÂ©.

8 ÃŽÂ©.

4 ÃŽÂ©.

10 ÃŽÂ©.

2 ÃŽÂ©.

8 ÃŽÂ©.

4 ÃŽÂ©.

10 ÃŽÂ©.

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Electrical Machines
In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

1/3, 1/3

1/√3, 1/3

1/3, 1/√3

1/√3, 1/√3

1/3, 1/3

1/√3, 1/3

1/3, 1/√3

1/√3, 1/√3

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Electrical Machines
In DC machine shape of armature MMF wave is?

Triangular and directed towards brush axis.

Saddle shape.

Triangular and directed towards main pole.

Peaky in nature.

Triangular and directed towards brush axis.

Saddle shape.

Triangular and directed towards main pole.

Peaky in nature.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Hunting in a synchronous motor takes place

motor is under loaded.

when load varies.

when power factor is unity.

when supply voltage fluctuates.

motor is under loaded.

when load varies.

when power factor is unity.

when supply voltage fluctuates.

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Electrical Machines

Electrical Machines A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred?

Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 ÃŽÂ©. Then the effective rotor resistance in the backward branch of the equivalent circuit will be

Electrical Machines In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

Electrical Machines In DC machine shape of armature MMF wave is?

Electrical Machines Hunting in a synchronous motor takes place

Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

Electrical Machines
In travelling cranes for crane travel, trolley and boom hoist which motor is preferred?

Electrical Machines
A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 ÃŽÂ©. Then the effective rotor resistance in the backward branch of the equivalent circuit will be

Electrical Machines
In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

Electrical Machines
In DC machine shape of armature MMF wave is?

Electrical Machines
Hunting in a synchronous motor takes place