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?

2166.67V, 270 rpm.

541.67V, 250 rpm.

2166.67V, 230 rpm.

541.67V, 200 rpm.

2166.67V, 270 rpm.

541.67V, 250 rpm.

2166.67V, 230 rpm.

541.67V, 200 rpm.

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Electrical Machines
Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to

infinity.

two.

zero.

unity.

infinity.

two.

zero.

unity.

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Electrical Machines
The breakdown torque of a synchronous motor varies as

V²

applied voltage V

1/V²

1/V

V²

applied voltage V

1/V²

1/V

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Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

6

1

4

2

6

1

4

2

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Electrical Machines
In travelling cranes for hoisting and lowering which type of motor is preferred?

DC series motor.

AC slip ring motor.

Single phase induction motor.

Synchronous motor.

DC series motor.

AC slip ring motor.

Single phase induction motor.

Synchronous motor.

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Electrical Machines
Which of the following statements is/are correct ?

Inter pole winding will act in interpolar region.

None of these

Compensating winding will act under the pole.

Both A and B.

Inter pole winding will act in interpolar region.

None of these

Compensating winding will act under the pole.

Both A and B.

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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 Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to

Electrical Machines The breakdown torque of a synchronous motor varies as

Electrical Machines In a dc machine 6 pole wave winding is used. The number of parallel paths are?

Electrical Machines In travelling cranes for hoisting and lowering which type of motor is preferred?

Electrical Machines Which of the following statements is/are correct ?

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
Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to

Electrical Machines
The breakdown torque of a synchronous motor varies as

Electrical Machines
In a dc machine 6 pole wave winding is used. The number of parallel paths are?

Electrical Machines
In travelling cranes for hoisting and lowering which type of motor is preferred?

Electrical Machines
Which of the following statements is/are correct ?