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, 230 rpm.

541.67V, 250 rpm.

2166.67V, 270 rpm.

541.67V, 200 rpm.

2166.67V, 230 rpm.

541.67V, 250 rpm.

2166.67V, 270 rpm.

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

2

6

1

4

2

6

1

4

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Electrical Machines
The power developed by salient pole synchronous machine is/are

None of these

power due to saliency or reluctance only

excitation power only

both 1 and 2

None of these

power due to saliency or reluctance only

excitation power only

both 1 and 2

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Electrical Machines
The power factor of squirrel cage induction motor is

low at heavy loads only

low at rated load only

low at light loads only

both A and B

low at heavy loads only

low at rated load only

low at light loads only

both A and B

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Electrical Machines
If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by

s2.

sf.

sf / 2.

f / s.

s2.

sf.

sf / 2.

f / s.

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Electrical Machines
If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is

200 V

230 V

460 V

115 V

200 V

230 V

460 V

115 V

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

Electrical Machines The power developed by salient pole synchronous machine is/are

Electrical Machines The power factor of squirrel cage induction motor is

Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by

Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is

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

Electrical Machines
The power developed by salient pole synchronous machine is/are

Electrical Machines
The power factor of squirrel cage induction motor is

Electrical Machines
If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by

Electrical Machines
If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is