A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be

Electrical Machines
A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be

0.72.

0.25.

0.62.

1.24.

0.72.

0.25.

0.62.

1.24.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
An IM cannot run at synchronous speed because

rotor torque will not be produced.

none of above.

induction motor will become synchronous motor.

air friction will prevent it.

rotor torque will not be produced.

none of above.

induction motor will become synchronous motor.

air friction will prevent it.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A DC generator can be considered as

power pump.

rectifier.

rotating amplifier.

prime mover.

power pump.

rectifier.

rotating amplifier.

prime mover.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

1/√3, 1/√3

1/3, 1/3

1/√3, 1/3

1/3, 1/√3

1/√3, 1/√3

1/3, 1/3

1/√3, 1/3

1/3, 1/√3

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

none of these.

non uniform cylindrical.

cylindrical.

salient.

none of these.

non uniform cylindrical.

cylindrical.

salient.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following statement is true for an AC synchronous motor?

It is a variable speed motor.

It is a step angled motor.

It is a constant speed motor.

It is a high reluctance motor.

It is a variable speed motor.

It is a step angled motor.

It is a constant speed motor.

It is a high reluctance motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be

Electrical Machines An IM cannot run at synchronous speed because

Electrical Machines A DC generator can be considered as

Electrical Machines In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

Electrical Machines In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

Electrical Machines Which of the following statement is true for an AC synchronous motor?

Electrical Machines
A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be

Electrical Machines
An IM cannot run at synchronous speed because

Electrical Machines
A DC generator can be considered as

Electrical Machines
In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are

Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

Electrical Machines
Which of the following statement is true for an AC synchronous motor?