Answer / sneha

DUE TO VARIATIONS IN VOLTAGES,VARYING MAGNETIC FIELD IS
PRODUCED & THIS VARYING MAGNETIC FIELD CHANGES DIMENSION OF
FERROMAGNETIC ELEMENT USED AS A TRANSFORMER ELEMENT & IT
APPEARS AS A VIBRASIONS.THIS VIBRATIONS ARE SOURCE OF THE
NOISE.

Answer / sheikh

Commonly new and quality wise transformer not producing too noise but due to magnetizing + mutual induction transformer creating some noise . old transformer which is cores becoming loose may producing heavier noise.

What should be the earth pit resistance value?

7 Answers   BARC,

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0 Answers  

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0 Answers  

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In 3pin or 5pin socket why the earth pin is bigger

3 Answers  

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hi friends can u tell me name of the sites where i can get animation of electrical machines......

1 Answers  

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As per BIS, Earth pit resistence value?

4 Answers  

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5 Answers   ABB, Emco,

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Why the field rheostat is adjusted such that the voltmeter reads 380V

0 Answers   SRM University,

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. What should be the minimum and maximum ohmic value for earthing?

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why Square root 3 used for three phase?

2 Answers  

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How phase displacement change in the over current relay coils.

0 Answers  

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