when we start the tube light, then it takes initially 1100
volt, after glow it takes 120 volt?(when we give 220 volt a.c.)
Answer Posted / prakash gokhale
Normally bulb or tubes are filled up with some gases.
deionisation of such gases gives the light as a product of
collidation of gas particles. But for that deionasation
high energy is required and we use choke for the same.
Choke is a inductive device which takes more power for
starting.
Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
briefly explain principle of resistance welding
why we use two slope(differential & restraining) in differential relay.but in busbar protection differential we are using only one slope?please explain
Explain marx circuit.
How you give clearance to a spare feeder.
What is resolver and glass scale in CNC how they work?
A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram
kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased
If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?
how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test. why transformer rating in always in KVA ? what ispositive, negative, zero sequence impedence? How ElCB tripping if Neutral touch with ground Why AC & DC capacitor are use in UPS ? why motor rating in KW? how to syncronize two dg sets
what is the mechanism of operation of brushless dc motor why is it more wexpensive then ordinary permanent magnet motors
State superposition theorem?
What range of speed can you get with the armature control method of speed control of d.c. Shunt motor?
what is star delta starter? how it works? give its control and power diagram.
how rectifier transformer work in electroststic precipetatore(esp?
sir please send me techinical questions for junior engineer posting in bangalore railway i am diploma holder