The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Electrical Machines
The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Xd = 8Ω and Xq = 10.8Ω

Xd = 9Ω and Xq = 9.6Ω

Xd = 9.6Ω and Xq = 9Ω

Xd = 10.8Ω and Xq = 8Ω

Xd = 8Ω and Xq = 10.8Ω

Xd = 9Ω and Xq = 9.6Ω

Xd = 9.6Ω and Xq = 9Ω

Xd = 10.8Ω and Xq = 8Ω

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Electrical Machines
When a transformer is loaded, the secondary terminal voltage drops. That means power factor is

unity.

zero.

leading.

lagging.

unity.

zero.

leading.

lagging.

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Electrical Machines
In a 3 - ÃŽÂ¦ IM in order to eliminate cogging the number of stator slots must be

unequal to number of rotor slots and skewed in shape.

an integral multiple of number of rotor slots.

equal to number of rotor slots.

either (B) or (C).

unequal to number of rotor slots and skewed in shape.

an integral multiple of number of rotor slots.

equal to number of rotor slots.

either (B) or (C).

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Electrical Machines
Which motors are preferred for refrigeration and air conditioning in smaller units?

Reluctance motors.

Induction motors.

Stepper motors.

Universal motors.

Reluctance motors.

Induction motors.

Stepper motors.

Universal motors.

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Electrical Machines
A DC compound motor has

tertiary winding.

only shunt field winding.

both shunt and series field winding.

only series field winding.

tertiary winding.

only shunt field winding.

both shunt and series field winding.

only series field winding.

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Electrical Machines
The residual magnetism of a self-excited dc generator is lost. To build up its emf again

the field winding must be replaced

the armature connection must be reversed

the field winding connection must be reversed

field winding must be excited by low voltage dc supply

the field winding must be replaced

the armature connection must be reversed

the field winding connection must be reversed

field winding must be excited by low voltage dc supply

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Electrical Machines

Electrical Machines The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is

Electrical Machines In a 3 - ÃŽÂ¦ IM in order to eliminate cogging the number of stator slots must be

Electrical Machines Which motors are preferred for refrigeration and air conditioning in smaller units?

Electrical Machines A DC compound motor has

Electrical Machines The residual magnetism of a self-excited dc generator is lost. To build up its emf again

Electrical Machines
The results of a slip test for determining direct axis (Xd) and quadrature axis (Xq) reactances of a star connected salient pole alternator are given below Phase values: Vmax = 108 V ; Vmin = 96 V Imax = 12 A ; Imin = 10 A Hence the two reactances will be

Electrical Machines
When a transformer is loaded, the secondary terminal voltage drops. That means power factor is

Electrical Machines
In a 3 - ÃŽÂ¦ IM in order to eliminate cogging the number of stator slots must be

Electrical Machines
Which motors are preferred for refrigeration and air conditioning in smaller units?

Electrical Machines
A DC compound motor has

Electrical Machines
The residual magnetism of a self-excited dc generator is lost. To build up its emf again