Why back emf used for a dc motor? Highlight its significance.

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what is the difference between ac and dc?

1 Answers  

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what is use of thermistor ?

2 Answers  

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How each of the following losses occur in d.c machines (i) copper (2)core (3) windage (4)friction please help me

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Why the symbol of register is "zig zag"

0 Answers   Suzlon,

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what is the relationship between current and frequency in AC circuit?

3 Answers  

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Is a direct shorth ciruit on a branch MCCB in a Low Voltage Switchboard a correct means of tesing the performance for discrimination?

0 Answers   Adani Power,

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how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

2 Answers  

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Transformer TTR test procedure

2 Answers   Descon,

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Is better to supply the voltage for static exciter from the auxiliary power source or from the SG terminals? And why?

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What is the formula to calculate capacitor bank rating for a certain load.

2 Answers  

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What is the basis for framing the rules of block diagram reduction technique?

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