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Electrical Machines
The wattage rating of a ceiling fan motor will be
50 - 150 W.
10 - 20 W.
200 - 250 W.
250 - 500 W.
50 - 150 W.
10 - 20 W.
200 - 250 W.
250 - 500 W.
Answer
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Related Question
Electrical Machines
Breadth factor is defined as the ratio of
emf with concentrated winding to emf with distributed winding.
None of these
emf with distributed winding to emf with concentrated winding.
both 1 and 2.
emf with concentrated winding to emf with distributed winding.
None of these
emf with distributed winding to emf with concentrated winding.
both 1 and 2.
Answer
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Electrical Machines
In case of DC Shunt Motor electromagnetic torque developed is
None of above.
Proportional to the square of armature current.
Proportional to the armature current.
Inversely proportional to the armature current.
None of above.
Proportional to the square of armature current.
Proportional to the armature current.
Inversely proportional to the armature current.
Answer
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Electrical Machines
To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used.
Ward Leonard control.
Rheostatic control.
Any of above method.
None of above.
Ward Leonard control.
Rheostatic control.
Any of above method.
None of above.
Answer
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Electrical Machines
A transformer has resistance and reactance in per unit as 0.01 and 0.04 respectively. Its voltage regulation for 0.8 power factor lagging and leading will be
6% and -4%
4.8% and -3.2%
3.2% and -1.6%
None of these
6% and -4%
4.8% and -3.2%
3.2% and -1.6%
None of these
Answer
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Electrical Machines
For an ideal transformer the winding should have
minimum resistance on primary side and maximum resistance on secondary side
maximum resistance on primary side and least resistance on secondary side
no ohmic resistance on either side
equal resistance on primary and secondary side
minimum resistance on primary side and maximum resistance on secondary side
maximum resistance on primary side and least resistance on secondary side
no ohmic resistance on either side
equal resistance on primary and secondary side
Answer
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