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Three Phase Induction Motors

Three Phase Induction Motors
The torque developed by a 3 phase induction motor least depends on

Shaft diameter
Rotor current
Rotor emf
Rotor power factor

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Three Phase Induction Motors
The condition of induction motor on load resemble those of a transformer whose secondady is _______

Supplying a variable resistive load
Short circuited
None of the listed here
Open circuited

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Three Phase Induction Motors
The reactance of the rotor circuit of a 3-phase induction motor is maximum at

No load
Half full load
Full load
Starting

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Three Phase Induction Motors
At no load the rotor core loss of a 3 phase induction motor is

Small
Practically zero
Large
None of the listed here

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Three Phase Induction Motors
The shaft of an induction motor is made of

High speed steel
Cast iron
Carbon steel
Stainless steel

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Three Phase Induction Motors
The number of slip rings on a squirrel cage induction motor is usually

Three
Two
None
One

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