SSC JE EE Quiz: Electrical Machine Booster Quiz-18

The generated emf per parallel path in armature of a DC Generator is

1) Directly proportional to flux

2) Inversely proportional to number of poles

3) Directly proportional to rotational speed of armature

Which of these is/are correct?

If the rotor circuit resistance of a 3-phase induction motor is increased, then:

In electric braking of shunt motors, plugging is used to control.

1) Printing press

2) Rolling mills

3) Elevators

The incorrect amongst these is/are:

The detrimental effects of armature reaction can be controlled by:

1) Increasing the length of air gap

2) Using commutating poles

3) Increasing the cross-section of pole pieces

Which of these is/are incorrect?

In an induction motor, at speeds near to synchronous speed, the torque-speed and torque-slip curves are approximately:

Compound generators are used to supply power to:

The following figure is the Speed-Current characteristics of:

If there were no copper losses in the motor:

Distribution Transformers:

1) Have good voltage regulation

2) Are designed for small value of current

Which of these is/are CORRECT?

Iron losses in a transformer is a sum of: