In speed control of DC Series motor, speed lower than the rated speed can be obtained by

Electrical Machines
In speed control of DC Series motor, speed lower than the rated speed can be obtained by

Connecting an additional resistance in stator circuit.

Connecting an additional resistance in the armature circuit.

Any of the above.

Connecting an additional resistance in the field circuit.

Connecting an additional resistance in stator circuit.

Connecting an additional resistance in the armature circuit.

Any of the above.

Connecting an additional resistance in the field circuit.

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Electrical Machines
The flux is maximum in the following part of a DC motor:

under the interpole.

under leading pole tip.

under trailing pole tip.

pole core.

under the interpole.

under leading pole tip.

under trailing pole tip.

pole core.

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Electrical Machines
In a synchronous motor hunting can be reduced to minimum possible by

providing damper winding in the rotor pole faces.

designing the motor for adequate synchronizing power.

any of above methods.

using a flywheel.

providing damper winding in the rotor pole faces.

designing the motor for adequate synchronizing power.

any of above methods.

using a flywheel.

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Electrical Machines
Speed of DC motor can be controlled by varying

its flux oer pole.

applied voltage.

all of these.

resistance of armature culture.

its flux oer pole.

applied voltage.

all of these.

resistance of armature culture.

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Electrical Machines
If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is

(1/2)Fmax.

(3/2)Fmax.

3Fmax.

Fmax.

(1/2)Fmax.

(3/2)Fmax.

3Fmax.

Fmax.

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Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

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Electrical Machines

Electrical Machines In speed control of DC Series motor, speed lower than the rated speed can be obtained by

Electrical Machines The flux is maximum in the following part of a DC motor:

Electrical Machines In a synchronous motor hunting can be reduced to minimum possible by

Electrical Machines Speed of DC motor can be controlled by varying

Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is

Electrical Machines The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively

Electrical Machines
In speed control of DC Series motor, speed lower than the rated speed can be obtained by

Electrical Machines
The flux is maximum in the following part of a DC motor:

Electrical Machines
In a synchronous motor hunting can be reduced to minimum possible by

Electrical Machines
Speed of DC motor can be controlled by varying

Electrical Machines
If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is

Electrical Machines
The result of slip test on a 3-phase, 20 KVA, 400 V, 50 Hz connected salient pole alternator is given below- Phase value: Vmax = 100 V, Vmin = 96 V, Imax = 10 A and I min = 7 A. The direct and quadranature axis reactances are respectively