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Single Phase Motors

Single Phase Motors
Which of the following applications would need the smallest size of motor?

Electric clock
Table fan
Sewing machine
Domestic mixi

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Single Phase Motors
Which motor has unsymmetrical rotor?

Universal motor
Shaded pole motor
Reluctance motor
Split phase motor

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Single Phase Motors
When a universal motor is operated on no load, its speed is limited by

Weight of the armature
Supply voltage frequency
Windage and friction
Armature reaction

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Single Phase Motors
A single phase induction motor employs ______ rotor.

Either squirrel cage or wound
None of the listed here
Wound
Squirrel cage

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Single Phase Motors
The repulsion start induction run motor is used because of

high starting torque
high efficiency
minimum cost
good power factor

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Single Phase Motors
In a capacitor start motor, the phase displacement between starting and running winding can be nearly

30°
60°
10°
90°

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