An induction motor can run at synchronous speed when
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Electrical Engineering · all questionsPolyphase Induction Motors
Polyphase Induction Motors
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Slip ring motor is preferred over squirrel cage induction motor where
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A change of 4% of supply voltage to an induction motor will produce a change of approximately
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If an induction motor with certain ratio of rotor to stator slots, runs at of the normal speed, the phenomenon will be termed as
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The 'cogging' of an induction motor can be avoided by
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The power scale of circle diagram of an induction motor can be found from
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In a three-phase induction motor, the number of poles in the rotor winding is always
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Which type of bearing is provided in small induction motors to support the rotor shaft?
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The vafcie of transformation ratio of an induction motor can be found by
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An induction motor is identical to
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The complete circle diagram of induction motor can be drawn with the help of data found from
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An induction motor with 1000 r.p.m. speed will have
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Less maintenance troubles are experienced in case of
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As load on an induction motor goes on increasing
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The frame of an induction motor is usually made of
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A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be
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DOL starting of induction motors is usually restricted to
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In induction motor, percentage slip depends on
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Reduced voltage starter can be used with
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The speed of a squirrel-cage induction motor can be controlled by all of the following except
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