why to use freewheeling diode ( diode in revers bias mode) across dc coil

2 Answers  

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What is the deffirant between EARTH, GROUND AND NUTRAL

4 Answers  

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what is impedance?

1 Answers   PWD,

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WHAT HAPPEN WHEN CT SECONDARY OPEN DURING LOAD

16 Answers   Neco,

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What are the methods used to improve powerfactor ?

6 Answers  

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What will be the total current for 300kva UPS if it runs on 40 to 45 percent load. Is there any formula for to calculate the exact load.

4 Answers   Sodexo,

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how the harmonic pluses take place in the flow of current

2 Answers  

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Showing results for capital, machinery, stock,wages, carriage in words, salaries, factory rent, repairs, fuel and power, buildings, debtors, sales, purchases, creditors, return outwords, return inwords, drawings, discount allowed, discount receivable, office expenses, bills payable, bills receivable, cash in hand, cash at bank, office rent comes under debit or credit

0 Answers  

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what happens when dc supply is given to the transformer?

3 Answers  

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In dc motor starter there is less voltage required for holding contactor that's may why it is called no volt coil. but in ac starter why holding contactor is called no volt coil.

2 Answers   JSW,

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What is the similarity and what is the difference between relays and PLC?

3 Answers   NTPC,

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Why 66KV is step down to 11KV and then 433v, not directly 66KV to 433v ?

2 Answers  

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