Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW?

Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW?

48.5 Hz

48 Hz

50 Hz

45 HZ

48.5 Hz

48 Hz

50 Hz

45 HZ

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Electrical Machines
The current drawn by the armature of DC motor is directly proportional to

None of above.

The speed of motor.

The voltage across the terminals.

The torque required.

None of above.

The speed of motor.

The voltage across the terminals.

The torque required.

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Electrical Machines
In DC motors, under trailing pole tips, flux density will_______ ?

decrease

either increase or decrease

increase

None of these

decrease

either increase or decrease

increase

None of these

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Electrical Machines
In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is

synchronous generator.

asynchronous generator.

asynchronous motor.

synchronous motor.

synchronous generator.

asynchronous generator.

asynchronous motor.

synchronous motor.

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Electrical Machines
A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

460 A.

250 A.

570 A.

340 A.

460 A.

250 A.

570 A.

340 A.

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Electrical Machines
The armature of DC machine is made of silicon steel lamination to

reduce eddy current loss only.

increase the permeability.

reduce hysteresis loss only.

reduce both eddy current and hysteresis loss.

reduce eddy current loss only.

increase the permeability.

reduce hysteresis loss only.

reduce both eddy current and hysteresis loss.

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Electrical Machines

Electrical Machines The current drawn by the armature of DC motor is directly proportional to

Electrical Machines In DC motors, under trailing pole tips, flux density will_______ ?

Electrical Machines In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is

Electrical Machines A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

Electrical Machines The armature of DC machine is made of silicon steel lamination to

Electrical Machines
The current drawn by the armature of DC motor is directly proportional to

Electrical Machines
In DC motors, under trailing pole tips, flux density will_______ ?

Electrical Machines
In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is

Electrical Machines
A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

Electrical Machines
The armature of DC machine is made of silicon steel lamination to