Power Systems
Which of the following statements is/are true? Due to corona,

 charging current increases
 power loss increases
All of these
 interference increases

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Power Systems
In coal fired thermal power stations, what are the electrostatic precipitators used for?

 To remove dust particles setting on the bus bar conductors in the station switch yard
 To collect the dust particles from the flue gases
All of these
 To keep the air heaters clean

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