Power Systems
Which of the following is/are the disadvantages of phase modifiers?

All of these
 Initial cost of synchronous phase modifier is higher
 It requires more maintenance because of running equipment
 It consumes both active and reactive power

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

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

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