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Single Phase Motors

Single Phase Motors
For the same rating, a dc series motor costs ______single phase series motor.

Less than
More than
None of the listed here
About the same

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Single Phase Motors
Reluctance motors are

Doubly excited
Singly excited
None of the listed here
Either of the listed

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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
Which of the following single phase motor is available with speed as low as one revolution per month?

Hysteresis
Shaded pole
Universal
Reluctance

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Single Phase Motors
Which of the following applications always have some load whenever switched on?

Fan motors
Piston drills
Vaccum cleaners
All of the listed here

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Single Phase Motors
The direction of rotation of an hysteresis motor is determined by

retentivity of the rotor material
position of shaded pole with respect to main pole
none of these
interchanging the supply leads

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