Electrical Machine - I

Separately excited generator ✘ Self-excited generator ✘ Level compound generator ✘ All the these ✔

100% regulation ✘ Small ✘ 10% regulation ✘ Infinity ✔

The tapping are provided at the phase ends ✘ The tapping are provided at the high voltage side ✘ The tapping are provided in middle of the transformer ✘ The tapping are provided on the low voltage side ✔

100 Kva ✘ 800 kVA ✘ All the above transformers ✘

2 poles ✘ 6 poles ✘ 4 poles ✘ 8 poles ✔

Electrical iron ✘ Tubelight ✘ Three phase motor ✘ rectifier ✔

It is easier to make narrow slots than wide open slots ✘ Large number of narrow slots reduces motor noise ✘ Large number of narrow slots reduces noise and tooth pulsation losses ✘ It helps in uniform distribution of flux ✔

4 ✘ 6 ✘ 2 ✘ 8 ✔

3° to 5°

✘ 2 rad to 3 rad ✘

15° to 30°

✘

1° to 3°

✔

Fibre glass ✘ Plastic ✘ Mica ✘ PVC ✔