DGVCL Exam Paper (11-12-2011)
It is difficult interrupt a capacitive current because

Current magnitude is very small
It has a leading power factor
Stored energy in the capacitor is very high
The restriking voltage can be high

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

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

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