Answer / sai bhargava

Dc machimes are designed like that angle betwean the stator flux and rotor flux is 90 degree to produce unidirectional torque

Answer / umesh

The torque formula for dc motor is T=k(current * flux)
The commutator with brush converts the dc into ac which produces alternating flux.It means both armature current and flux are positive or negative at the same time.

When are the directional relays used?

0 Answers  

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hi!!! i have a question that how the thermal test in winding temprature test is taken can anyone explain me in detail??? i will b very thankful!!!!

1 Answers  

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how to measure earth pit resistance

7 Answers   BARC, BYD Electronic, Construction,

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An electric bulb giving light but at the time of lighting which one it takes? voltage or current

6 Answers  

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In electrical cables what is U and U0 refers?

11 Answers  

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) why transformer cannot rotate though the principle behind induction motor is similar to a transformer

3 Answers  

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If the Power Factor of generator is 0.85...What does this mean and Can the motors connected to this generator operate at PF more than 0.85 ?

1 Answers  

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dg earth connect only in the amf panel or not why

0 Answers  

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what is the use of CAPACITOR in CFL lamp?

6 Answers   Areva, Autopal,

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Dear sir,how should i set the relay in star delta starter..say ex i am having 4ohp motor,,wht should be the relay setting...?

4 Answers  

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What is meant by vector group

0 Answers   GPSC Gujarat Public Service Commission, VA Tech Wabag,

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what is the difference between earthed system and unearthed system.. where do we use unearthed system because in electrical catalogues always cable for earthed and unearthed system is given..pls elaborate

3 Answers  

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