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Electrical Machines

Electrical Machines
The wattage rating of a ceiling fan motor will be

 250 - 500 W.
  50 - 150 W.
 200 - 250 W.
 10 - 20 W.

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Electrical Machines
In Ward-Leonard method of speed control, the direction of rotation of motor is reversed usually reversing the connection of the

 motor armature terminal.
 generator field terminal.
 motor field terminal.
 generator armature terminal.

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Electrical Machines
The direction of rotation of conductor of a DC motor can be determined by

 Ampere law.
 Fleming's right hand rule.
 Lenz's law.
 Fleming's left hand rule.

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Electrical Machines
A series motor is efficiently suitable for

 none of these.
 low starting torque operation.
  high starting torque operation.
 constant speed operation.

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Electrical Machines
In DC generators, electric current to the external circuit from armature is given through

 none of above.
 commutator.
 slip rings.
 solid connection.

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Electrical Machines
When two DC series motors are connected in parallel, the resultant speed is

 zero.
 normal speed.
 more than normal speed.
 less than normal speed.

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MORE MCQ ON Electrical Machines

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