Two of supply terminals to a 3 - ÃŽÂ¦ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will

Electrical Machines
Two of supply terminals to a 3 - ÃŽÂ¦ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will

not start at all.

rotate in direction opposite to that before maintenance.

get heated and damaged.

rotate in the same direction as before maintenance.

not start at all.

rotate in direction opposite to that before maintenance.

get heated and damaged.

rotate in the same direction as before maintenance.

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Electrical Machines
In DC generators brushes are used for

collecting of current without any sparkings

reduce eddy current loss

collecting of voltage

convert ac armature current in to dc

collecting of current without any sparkings

reduce eddy current loss

collecting of voltage

convert ac armature current in to dc

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Electrical Machines
Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of

Field current.

Armature current.

None of above.

Line current.

Field current.

Armature current.

None of above.

Line current.

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Electrical Machines
In DC generator, lap winding is used in

high voltage and low current applications.

where greater load is connected.

high current and low voltage applications.

where constant speed is required.

high voltage and low current applications.

where greater load is connected.

high current and low voltage applications.

where constant speed is required.

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Electrical Machines
Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements

1, 2 and 4 are correct

1 and 3 are correct

1, 2 and 3 are correct

2 and 4 are correct

1, 2 and 4 are correct

1 and 3 are correct

1, 2 and 3 are correct

2 and 4 are correct

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Electrical Machines
If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by

Khf2Bm1.6.

KhfBm3.

KhfBm.

KhfBm1.6.

Khf2Bm1.6.

KhfBm3.

KhfBm.

KhfBm1.6.

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Electrical Machines

Electrical Machines Two of supply terminals to a 3 - ÃŽÂ¦ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will

Electrical Machines In DC generators brushes are used for

Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of

Electrical Machines In DC generator, lap winding is used in

Electrical Machines If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by

Electrical Machines
Two of supply terminals to a 3 - ÃŽÂ¦ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will

Electrical Machines
In DC generators brushes are used for

Electrical Machines
Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of

Electrical Machines
In DC generator, lap winding is used in

Electrical Machines
If Kh is hysteresis constant, f is supply frequency, Bm maximum flux density in core of transformer, the expression of hysteresis loss in transformer, is given by