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20 পোলএবং 50Hz এর একটি থ্রি ফেজ ইন্ডারকশন মোটরের সিনক্রোনাস স্পিড হবে-
3000rpm
600 rpm
1000 rpm
1200 rpm
ANSWER : 1
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<pre>সিনক্রোনাস স্পিড, <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo> </mo><msub><mi>N</mi><mi>s</mi></msub><mo> = </mo><mo> </mo><mfrac><mrow><mn>120</mn><mi>f</mi></mrow><mi>p</mi></mfrac><mo> </mo><mspace linebreak = "newline"/><mo> = </mo><mo> </mo><mfrac><mrow><mo>(</mo><mn>100</mn><mo>×</mo><mn>50</mn><mo>)</mo></mrow><mn>20</mn></mfrac><mspace linebreak = "newline"/><mo> = </mo><mo> </mo><mn>300</mn><mi>r</mi><mi>p</mi><mi>m</mi><mo>.</mo></math> </pre>
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