Power Systems
Critical disruptive voltage is a voltage at which

 corona is visible with blue or violet colour
 corona is just initiated
 nether 1 nor 2
 both 1 and 2

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Power Systems
Which of the following statements is true? Corona loss increases with

 decrease in conductor size and increase in supply frequency
 decrease in conductor size and decrease in supply frequency
 increase in conductor size and increase in supply frequency
 increase in conductor size and decrease in supply frequency

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