A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

474 V

240 V

6 V

234 V

474 V

240 V

6 V

234 V

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Electrical Machines
High inrush of current during a starting of DC motor can efficiently be restricted to a safer value by increasing the _________________ resistance.

shunt field

armature circuit

both A and B

none of above

shunt field

armature circuit

both A and B

none of above

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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 connection must be reversed

the field winding must be replaced

field winding must be excited by low voltage dc supply

the armature connection must be reversed

the field winding connection must be reversed

the field winding must be replaced

field winding must be excited by low voltage dc supply

the armature connection must be reversed

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Electrical Machines
A DC generator beyond critical resistance will generate

maximum voltage.

maximum current.

no voltage.

maximum power.

maximum voltage.

maximum current.

no voltage.

maximum power.

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Electrical Machines
Iron loss in a transformer mainly occurs in

winding of transformer.

iron made tank of transformer.

transformer insulating oil.

steel core in transformer.

winding of transformer.

iron made tank of transformer.

transformer insulating oil.

steel core in transformer.

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Electrical Machines
In a transformer zero voltage regulation is achieved at a load power factor which is

unity

zero

lagging

leading

unity

zero

lagging

leading

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Electrical Machines

Electrical Machines A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

Electrical Machines High inrush of current during a starting of DC motor can efficiently be restricted to a safer value by increasing the _________________ resistance.

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

Electrical Machines A DC generator beyond critical resistance will generate

Electrical Machines Iron loss in a transformer mainly occurs in

Electrical Machines In a transformer zero voltage regulation is achieved at a load power factor which is

Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be

Electrical Machines
High inrush of current during a starting of DC motor can efficiently be restricted to a safer value by increasing the _________________ resistance.

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

Electrical Machines
A DC generator beyond critical resistance will generate

Electrical Machines
Iron loss in a transformer mainly occurs in

Electrical Machines
In a transformer zero voltage regulation is achieved at a load power factor which is