what happens when we give ac supply to the dc motor?and why?

4 Answers  

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what is the path of electron when a static electron is placed in a magnetic field?

1 Answers  

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how to reduce earth resistance in sandy soil.

1 Answers  

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iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]

1 Answers  

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what is the difference between earthed cables and unearthed cables

2 Answers   Bhel,

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why we not used 11kva as a direct our electrnics component.

0 Answers  

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what is difference between fuse and breaker?

6 Answers   ABB,

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why can we use cosine wave instead of sine in ac supply as both have same rms vale and ripple factor

0 Answers   Indcoil Transformers, Power Grid,

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What are the protections to be used for Generator?

5 Answers  

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Transformer rating=> 15/20 MVA.Why there are two raings? What should be the rating of the fuse at the secondary if the voltage level is 13.8KV/4.16KV?

1 Answers   Bhel,

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Load transfer in 11kv double busbar switchgear - operation.

0 Answers   KSEB, L&T, Siemens,

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howmany insolaters needed in 66kv line

9 Answers   Essar, L&T,

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