Answer / ashok

to produce a instantaneous high voltage to ignite the
tube.because tube has no filament ,it has only a gas inside
it . to ionize the gas tube need high voltage at starting.

Answer / sushil259

Actually, we all know that emf is induced in a inductor
whenever there is a change in current as per relation
e=Ldi/dt. so as we require high voltage approx. 600V to
start ionisation in the tube light, we change current with
the help of starter which helps in building voltage across
choke and when ionisation gets started, starter short
circuited and choke supply now is reduced tp approx 110V
which is required to light up tube. if normal supply i.e.
230V is given directly to the tube it will burn.

Answer / ramanjaneyulu

to produce instantaneyosly high voltage i.e 1100v then the
tube will glow the voltage will be redused to 110v

how give earthing to shif and aeroplane which is away from earth?

1 Answers   ABC,

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10Hp, 3-phase, 415v, 50Hz induction motor. The above motor is to run on Star-Delta connection, so how do i make following hardware selection 1) MCB, 2) Contactor, 3) Wire Gage (Depending on P-P current or Line Current), 4) OLR, Please tell in detail how to do the above, so as to get the ans. of it even if the Hp rating changes.

1 Answers   Engro,

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how to calculate the chiller load from TR to KW?

0 Answers  

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sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

0 Answers   Jindal,

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can we increase our frequency rate in INDIA?

4 Answers  

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why magnetising curve not start with zero voltage?

0 Answers   TATA,

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Please brief me about number of pole in alternator.In single phase alternator coils are connected in star or series. How to calculate frequency for the same.

0 Answers  

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can any one provide some material?

1 Answers  

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i want to ask that as everybody knows that in star connection on star point is called neutral. my question is that why on that poin called neutral. what is the reason behind it. what is the logic behind it. i heared somewhere that on this point all phases current become zero thats why. if this answer is right then prove why on that point is current become zero. if this answer is not right then tell me the right answer. post ur answer here or on my mail address. m.ikram786@yahoo.com m.ikram555@gmail.com. thanks.

1 Answers  

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describe the fully control circuit diagram of ac drives

0 Answers  

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What is the magnetic field (coil DC ) of Turbo Expander?

0 Answers   TATA,

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What is the difference between the watt hour meter and Var hour meter in terms of internal connection and work theory . ie "When the meter records watt-hour an when the meter records var hours ??"

13 Answers  

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