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The concept of the slip is used in___________(a) Synchronous machine(b) Induction machine(c) DC machine(d) TransformerThis question was posed to me in a national level competition.The question is from Induction Motors topic in chapter Braking of DC Motors & Induction Motors of Electric Drives

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The CORRECT option is (B) Induction machine

To explain I would say: The slip in the Induction motor is s = Ns-Nr÷ Ns. The slip existence is DUE to the relative SPEED between the stator magnetic field and rotor.



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