Answer / manoj kumar sahoo

A ballast & ignitor is required in MH & other lighting
fixture because its takes high voltage in starting and
normal voltage in running periods.

Answer / k.prakashchandra

They create high voltage initially to strike the arc, then
the ballast limits the current as the resistance of the bulb
becomes zero due to ionization.

Why more sound is produced in mixer than grinder

2 Answers   Vedant,

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how we can convert 3 phase to single phase without using any transformer

8 Answers  

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why is the conservator tank painted white on the transformer

0 Answers   Bangladesh Bank,

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Can we parallel lise the secondary side of the two similiar transformers with same voltage ration, imp, but with different vector groups.. ( for ex. 11 KV / 6.6KV two trfs but different vector groups can we parallelise both of them ,, what happens if we parallelise them

1 Answers  

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what is G.O.D.S. ?

2 Answers   RCE,

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what are the importance of earthing?list different types of earthing.

1 Answers  

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What is earth system using on the floater TN-S or TT. Iam not sure and what ICCP

0 Answers  

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What is the formula of frequency ?

0 Answers  

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Will MCB tripped off, if there is an electric shock to Human body?

9 Answers  

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How to calculate motor current for 3 ph & 1 Ph motor from KW rating?

3 Answers  

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What is meant by reactance voltage?

0 Answers  

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I try to check the three phase voltage in multimeter, in 125A isolator switch incommer. first i touch R phase, and then i touch Y phase using multimeter, the moment i touched, it blasts and that moment i got blindness. multimeter selector position is correct(750V AC MODE AND RED PROBE WASS IN v AND BLACK PROBE WASS IN COM. MODE. COULD ANYBODY GIVE ANSWER FOR THIS TO AVOID FURTHER ACCIDENTS PLEASE?

2 Answers  

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