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For a 6-pole 3-phase induction motor, its nominal slip SN＝0.04, the its nominal rotating speed is ( ).

A. 200r/min
B. 380r/min
C. 540r/min
D. 960r/min

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The relationship between rotor current and slip of a squirrel cage induction motor is( ).

A. the bigger the s, the bigger the current
B. the bigger the s, the smaller the current
C. the current remains the same when s increases
D. none of the above

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For a 50Hz 3-phase induction motor, its nominal speed is 730r/min,then its nominal slips and number of pole pairs is ( ) respectively.

A. s=0.0267 p=2
B. s=2.67 p=4
C. s=0.0267 p=4
D. s=2.67 p=3

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For a 2-pole, 50Hz 3-phase induction motor, is the nominal slip sN=0.04,then the nominal rotating speed is ( ).

A. 3000 r/min
B. 1000 r/min
C. 2880 r/min
D. 1440 r/min

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The nominal power factor of a 3-phase induction motor is 0.85, then the power factor under light load condition can be ( ).

A. 0.9
B. 0.87
C. 0.85
D. 0.5

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For a 6-pole 3-phase induction motor, its nominal slip SN＝0.04, the its nominal rotating speed is ( ).

A. 200r/min B. 380r/min C. 540r/min D. 960r/min

The relationship between rotor current and slip of a squirrel cage induction motor is( ).

For a 50Hz 3-phase induction motor, its nominal speed is 730r/min,then its nominal slips and number of pole pairs is ( ) respectively.

For a 2-pole, 50Hz 3-phase induction motor, is the nominal slip sN=0.04,then the nominal rotating speed is ( ).

The nominal power factor of a 3-phase induction motor is 0.85, then the power factor under light load condition can be ( ).

A. 200r/min
B. 380r/min
C. 540r/min
D. 960r/min