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.

THERMAL CAPACITANCE IS MEASURED IN..................................................

0 Answers   SSC,

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what convarts RRA in alternator ,AC to DC or DC to AC,

1 Answers   Birla,

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Capacitor panel CT is normally fixed on Y phase of the main panel.why???

3 Answers  

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what are the insulation properties.

2 Answers   Cable Wireless, MAHINDRA,

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why we do occ & scc test in transformer ?how we can do it ?

2 Answers  

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why and where we use early make & late break contacts in protection?

0 Answers  

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What is Annunciation?

0 Answers   Solare,

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Brushed alternator is also called dc generator ? its true or false ?explain it ?

5 Answers  

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how to protect motor in dol starter having capacity of 30 hp.40 hp?

0 Answers  

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how the works electronic energy meter?

0 Answers   Bhel,

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Difference between transmission line and cable?when ever a large water channel has to crossed it is easier to use cable then transmission line why?

1 Answers  

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What is difference between 3 point and 4 point starter

1 Answers   Genco, Kaltec, TATA,

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