DGVCL Exam Paper (11-12-2011)
The purpose of providing a choke in a tube light is

To eliminate corona effect
To avoid radio interference
To improve the power factor
To limit the current to an appropriate value

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DGVCL Exam Paper (11-12-2011)
A fuse wire should have

High specific resistance and low melting point
High specific resistance and high melting point
Low specific resistance and low melting point
Low specific resistance and high melting point

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DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

Amount of copper in the winding
Harmonics in the generated emf
Size of the machine
Cost of the machine

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

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