A separately-excited DC generator, running at rated speed, has 6 volts across its armature terminals with no field current. When field winding is excited with one ampere, the voltage builds up to 250 V at no load. In case field current is reduced to zero, with the speed remaining unaltered, the armature terminal voltage would be

Electrical Machines
A separately-excited DC generator, running at rated speed, has 6 volts across its armature terminals with no field current. When field winding is excited with one ampere, the voltage builds up to 250 V at no load. In case field current is reduced to zero, with the speed remaining unaltered, the armature terminal voltage would be

more than 6 V

less than 6 V

zero

6 V

more than 6 V

less than 6 V

zero

6 V

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a dc machine, the demagnetizing effect of armature reaction is due to

component of armature mmf along field axis

non-sinusoidal nature of armature mmf

uneven air-gap length

magnetic saturation in half of the field pole

component of armature mmf along field axis

non-sinusoidal nature of armature mmf

uneven air-gap length

magnetic saturation in half of the field pole

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC generator, the ripples in the direct emf generated are reduced by employing

carbon brushes.

equalizer rings.

graphite brushes.

commutator with large number of segments.

carbon brushes.

equalizer rings.

graphite brushes.

commutator with large number of segments.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Type of single phase motor having highest power factor at full load is

shaded pole type.

capacitor run.

split phase.

capacitor start.

shaded pole type.

capacitor run.

split phase.

capacitor start.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The output indicate on the name plate of any motor is always the

Gross power.

Power drawn in KVA.

Output power at the shaft.

Power drawn in KW.

Gross power.

Power drawn in KVA.

Output power at the shaft.

Power drawn in KW.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Due to magnetic saturation, the flux per pole in a DC machine without brush shift

increases in both the generators and the motors with load.

decreases in generators and increases in motor with load.

decreases in both generators and the motors with load.

increases in generators but decreases in motor with load.

increases in both the generators and the motors with load.

decreases in generators and increases in motor with load.

decreases in both generators and the motors with load.

increases in generators but decreases in motor with load.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines In a dc machine, the demagnetizing effect of armature reaction is due to

Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing

Electrical Machines Type of single phase motor having highest power factor at full load is

Electrical Machines The output indicate on the name plate of any motor is always the

Electrical Machines Due to magnetic saturation, the flux per pole in a DC machine without brush shift

Electrical Machines
In a dc machine, the demagnetizing effect of armature reaction is due to

Electrical Machines
In a DC generator, the ripples in the direct emf generated are reduced by employing

Electrical Machines
Type of single phase motor having highest power factor at full load is

Electrical Machines
The output indicate on the name plate of any motor is always the

Electrical Machines
Due to magnetic saturation, the flux per pole in a DC machine without brush shift