Rajkamal Sir (Engineers Platform) 📚📚

1. Slip of a 3-phase induction motor may be expressed as

4. If an alternator is operating with unity power factor load, then the effect of armature reaction on the main-field flux of an alternator will be[SSC JE EE 2021]

3. Regulation of an alternator supplying resistive or inductive load is[SSC JE EE 2014]

2. Which of the following condition is NOT mandatory for alternators working in parallel? [SSC JE EE 2014]

1. For which of the following the excitation control method is satisfactory? [SSC JE EE 2014]

5. In alternators, the ratio of the vector sum of the induced EMFs per coil to the arithmetic sum of the induced EMFs per coil is defined as:

4.In a synchronous motor, when the load on the motor is increased, the rotor progressively tends to:

3.In the case of alternators with single-layer concentric windings, the number of slots is equal to:

2.Which of the following is NOT true with respect to short-pitched coils in alternators?

1. In case of two-layer winding in the stator of alternators, each slot in the stator contains:

5. Calculate the highest speed at which a 60 Hz alternator can be operated.

4. If the no-load voltage of a 3-phase, 440 V, 50 Hz alternator is 495 V, then its voltage regulation is: [SSC JE EE 2020]

3. What is the frequency of the generated EMF in a six-pole alternator running at 1200 rpm? [SSC JE EE 2020]