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Single Phase Motors

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

Domestic mixi
Electric clock
Table fan
Sewing machine

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Single Phase Motors
A 4 pole, 50 Hz single phase induction motor has a slip of 5% . The speed of the motor will be

1200 rpm
None of the listed here
1425 rpm
1500 rpm

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Single Phase Motors
The capacitor start, capacitor run induction motor acts as a true 2-phase motor at _______

Starting
Full load
All loads
No load

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Single Phase Motors
A shaded pole motor can be used for

Toys
Hair dryers
Any of the listed here
Circulators

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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 voltage
either of the above depending on power factor
from shaded pole to main pole

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Single Phase Motors
A capacitor-start single phase induction motor is switched on to supply with its capa-citor replaced by an inductor of equivalent reactance value. It will

start and then stop
start and run slowly
start and run at rated speed
not start at all

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