An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

541.67V, 200 rpm.

2166.67V, 270 rpm.

2166.67V, 230 rpm.

541.67V, 250 rpm.

541.67V, 200 rpm.

2166.67V, 270 rpm.

2166.67V, 230 rpm.

541.67V, 250 rpm.

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Electrical Machines
In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages?

Delta side lags by -30°.

Delta side leads by 30°.

Star side lags by -30°.

Star side leads by 30°.

Delta side lags by -30°.

Delta side leads by 30°.

Star side lags by -30°.

Star side leads by 30°.

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Electrical Machines
Which of the following is done in speed control of DC motor by field flux control?

Inserting resistance to armature circuit and field circuit.

Any of above.

Inserting an additional resistance in the field circuit.

Inserting an additional resistance in the armature circuit.

Inserting resistance to armature circuit and field circuit.

Any of above.

Inserting an additional resistance in the field circuit.

Inserting an additional resistance in the armature circuit.

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Electrical Machines
A lap wound DC machine has 400 conductors and 8 poles. The voltage induced per conductor is 2 volts. The machine generates a voltage of

800 V.

200 V.

100 V.

400 V.

800 V.

200 V.

100 V.

400 V.

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Electrical Machines
Stepper motor is used in

computer printers

traction

All of these

food processing

computer printers

traction

All of these

food processing

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Electrical Machines
A 3 - φ induction motor can also be referred to as a

asynchronous motor.

shunt motor.

transformer.

repulsion motor.

asynchronous motor.

shunt motor.

transformer.

repulsion motor.

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Electrical Machines

Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

Electrical Machines In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages?

Electrical Machines Which of the following is done in speed control of DC motor by field flux control?

Electrical Machines A lap wound DC machine has 400 conductors and 8 poles. The voltage induced per conductor is 2 volts. The machine generates a voltage of

Electrical Machines Stepper motor is used in

Electrical Machines A 3 - φ induction motor can also be referred to as a

Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

Electrical Machines
In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages?

Electrical Machines
Which of the following is done in speed control of DC motor by field flux control?

Electrical Machines
A lap wound DC machine has 400 conductors and 8 poles. The voltage induced per conductor is 2 volts. The machine generates a voltage of

Electrical Machines
Stepper motor is used in

Electrical Machines
A 3 - φ induction motor can also be referred to as a