Answer / nishant2110

Noise in transformr is caused by MAGNETOSTRICTION.

magnetostriction is process of slight changing physical size
of magnetic material when kept in varying magnetic field.

Since gap due to bad insulation and bad stacking factor give
sufficient place for core to vibrate in between due to
change in its size

what is the formulae for calculating the cable size for a given voltage and current.

4 Answers   Bharat Forge,

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Write a note on Treatment for electric shock.

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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

0 Answers  

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please send me RRB electrical engineer previous year questions for Sr. Section Engineer

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How the earth fault relay works please explain?????????

2 Answers  

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what is derated current of power cable & what is formule to find derated current?

1 Answers   Thermon,

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design a LV scheme for a 15 storied building?

0 Answers  

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why transformer ratings in kva?

99 Answers   Bhel, College School Exams Tests, DOW, Emco, Esab, GE, KCP, PGCVL, Sodexo, TCS, vtps, Wipro,

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what is meant by boost charge in batteries

1 Answers   MTS,

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some practicle study shows that the reactive power at the receiving end is not equal to the reactive power at the sending end.But according to theory the reactive power is exchanged by different parts of the network – capacitors and reactors permanently, but is never consumed or produced. Then Where that reacrtive power loss occuring?is there any formula to calculate reactive power loss?

3 Answers  

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why the rating of transformer in only KVA not in others?

7 Answers  

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what instruments used for measuring of inductance and capacitance.

2 Answers  

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