Which of the following factors affect Corona?
1. Atmospheric conditions, temperature, humidity, moisture, ice and fog
2. Current of conductor
3. Waveform
4. Condition of surface of conductors, smoothness and dust1
1, 2 and 3 only
2
1, 3 and 4 only
3
1, 2 and 4 only
4
2, 3 and 4 only
5
Question Not Attempted