Answer / rabi

When starting the lamp, a glow discharge will appear over
the electrodes of the starter. This glow discharge will
heat the gas in the starter and cause the bi-metallic
electrode to bend towards the other electrode. When the
electrodes touch, the two filaments of the fluorescent lamp
and the ballast will effectively be switched in series to
the supply voltage. This causes the filaments to glow and
emit electrons into the gas column by thermionic emission.
In the starter's tube, the touching electrodes have stopped
the glow discharge, causing the gas to cool down again. The
bi-metallic electrode also cools down and starts to move
back. When the electrodes separate, the inductive kick from
the ballast provides the high voltage (about 1 KV) to start
the lamp.

why does not tester light up when it is touched to neutral of 3 pin socket.

4 Answers  

---

how to find the resistance and gap volatage of the diode??

0 Answers  

---

While connecting the flood light plug on to the 415 V distribution panel,there was spark and the cable got burnt. Three ignitors of the flood light also burnt of. The lamps are of 400 W (total 6 lamps) connected through 1.5 mm2 cable. The plug was immediately removed from the circuit. There was a 30 mA RCD connected and a 250 A MCCB; however both did not trip. What could be the possible reasons for the circuit devices not to trip?Can someone assist please. Additional info if needed can be provided.

2 Answers  

---

Between rotating armature type and rotating field type arrangements which one is adopted for large rated alternators and DC generators.Why there is difference in the choice?

1 Answers  

---

Why we use Electrical energy rather than any other type of energy, mostly? Explain behavior of open secondary CT and short circuited secondary PT in energized condition?

0 Answers  

---

what do you mean by synchronous speed of a three phase induction motor?

5 Answers   FlexPoint,

---

Why power genaration in India is at 50HZ while America its 60HZ

0 Answers   TATA,

---

Why we use stones in switchyard?

3 Answers   Havells, L&T,

---

Which one is given high energy in same power consumption AC or DC

1 Answers   Dhyey Creation,

---

what is the distance b/w EHV lines? 1.8m 2.11m 3.4m 4.14m

7 Answers   HAL,

---

How are load losses and no-load losses measured at site in a DG set?

0 Answers  

---

can you give main difference between ELCB And RCCB?

38 Answers   MCB Bank, Reliance, Wipro,

---