Q.

The only advantage of corona is that it

  • AProduces a pleasing luminous glow
  • BMakes line current sinusoidal 
  • CWorks as a safety valve for surges
  • DOzone gas is produced 
Correct Answer : (C)

Works as a safety valve for surges

Hints :

The only advantage of corona is that it Works as a safety valve for surges.

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