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Single Phase Motors
The speed/load characteristics of a universal motor is same as that of
DC series motor
None of the listed here
AC motor
DC shunt motor
DC series motor
None of the listed here
AC motor
DC shunt motor
Answer
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Related Question
Single Phase Motors
In case of a shaded pole motor the direction of rotation of the motor is
from main pole to shaded pole
either of the above depending on power factor
either of the above depending on voltage
from shaded pole to main pole
from main pole to shaded pole
either of the above depending on power factor
either of the above depending on voltage
from shaded pole to main pole
Answer
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Single Phase Motors
A Reluctance motor
Is constant speed motor
Need no dc excitation
All of the listed here
Is self starting
Is constant speed motor
Need no dc excitation
All of the listed here
Is self starting
Answer
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Single Phase Motors
The speed control of universal motor used for sewing machines is by
Centrifugal mechanism
Varying the resistance
Friction
Tapping the field
Centrifugal mechanism
Varying the resistance
Friction
Tapping the field
Answer
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Single Phase Motors
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will
Become unstable
Fall out of synchronism and come to stand still
Draw excessive armature current and may burn out
Run as induction motor
Become unstable
Fall out of synchronism and come to stand still
Draw excessive armature current and may burn out
Run as induction motor
Answer
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Single Phase Motors
If the capacitor of a single-phase motor is short-circuited
the motor will run in reverse direction
the motor will run in the same direction at reduced r.p.m.
the motor will not start
the motor will run
the motor will run in reverse direction
the motor will run in the same direction at reduced r.p.m.
the motor will not start
the motor will run
Answer
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