DGVCL Exam Paper (11-12-2011)
Under operating conditions, the secondary of a current transformer is always short ciruited because

It is safe to human beings
It avoids core saturation and high voltage induction
It protects the primary ciruits
It protects the secondary ciruits

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DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Universal motor
Capacitor start motor
Capacitor start capacitor run motor
Split phase motor

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DGVCL Exam Paper (11-12-2011)
The advantage of slipring induction motor over the squirrel cage induction motor is

It has a higher efficiency
It can be started with the help of rotor resistances
It is suitable for higher speeds
It's power factor is higher

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