Why a ballast and ignitor is required in MH and other lighting fixtures

2 Answers   Future Group,

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In an ideal transformer no load primary current I0 A lags behind V1 by 90 degree B is in the phase with V1 C leads V1 by 90 degree D lags V1 by 45 degree

1 Answers  

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what use can we make of 3rd harmonic component

5 Answers   Bhel, General Motors GM,

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how many types control panel of a 132/33 kv substation

0 Answers   Alstom,

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what is submersible pump?what is different between motor and sub motor?

0 Answers  

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What is the meaning of In,Io & Ir in Circuit breaker? How to calculate?

1 Answers  

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how much UPS neutral erath leakage current.

0 Answers   HP,

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What is the function of RCCB? What are the different sensitivity ratings & each application?

6 Answers   Wipro,

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Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.

0 Answers  

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what do you mean by puncturing of insulator by ice -coating?

2 Answers  

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1.Why we use choke?If we use for high starting voltage then different type choke gives different voltage. Is it correct?

2 Answers   Dalkia, Luminous,

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how to calculate slip ring induction motor stator and rotor currents??

0 Answers  

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