Consider the following statements : 1. interpole windings are connected in series with armature windings 2. polarity of interpoles must be the same as that of the main poles in advance 3. distortion of the main field under the pole shoes is not affected by the use of interpoles From above, the correct answer is

Electrical Machines
Consider the following statements : 1. interpole windings are connected in series with armature windings 2. polarity of interpoles must be the same as that of the main poles in advance 3. distortion of the main field under the pole shoes is not affected by the use of interpoles From above, the correct answer is

2 and 3

1 and 2

1 alone

1 and 3

2 and 3

1 and 2

1 alone

1 and 3

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
DC Shunt Motor has disadvantage(s) of

constant speed.

none of above.

not suitable for rapidly changing loads.

less expensive.

constant speed.

none of above.

not suitable for rapidly changing loads.

less expensive.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The compensating winding in a DC machine

is located on commutating poles for improving commutation.

is located in armature slots for compensation of the armature reaction.

is located on pole shoes for avoiding the flashover at the commutator.

is located on pole shoes to avoid the sparking at the brushes.

is located on commutating poles for improving commutation.

is located in armature slots for compensation of the armature reaction.

is located on pole shoes for avoiding the flashover at the commutator.

is located on pole shoes to avoid the sparking at the brushes.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be

0.54 Ω.

0.01 Ω.

0.06 Ω.

0.54 Ω.

0.01 Ω.

0.06 Ω.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them

just behind the magnetic neutral axis.

None of these

in magnetic neutral axis.

just ahead of magnetic neutral axis.

just behind the magnetic neutral axis.

None of these

in magnetic neutral axis.

just ahead of magnetic neutral axis.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is

40

60

660

600

40

60

660

600

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines DC Shunt Motor has disadvantage(s) of

Electrical Machines The compensating winding in a DC machine

Electrical Machines A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be

Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them

Electrical Machines The current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is

Electrical Machines
DC Shunt Motor has disadvantage(s) of

Electrical Machines
The compensating winding in a DC machine

Electrical Machines
A 6 pole lap connected DC generator with 480 conductors has armature resistance of 0.06 Ω. If the conductors are reconnected to from a wave winding other things remaining unchanged, the value of armature resistance will be

Electrical Machines
To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them

Electrical Machines
The current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is