Corona effect in transmission can be detected by-
1. hissing sound
2. faint luminous
3. presence of ozone which is detected by odour
Which of these is/are correct?1
Only 1 and 2
2
Only 1 and 3
3
Only 2
4
Only 1, 2 and 3
Corona effect in transmission can be detected by-
1. hissing sound
2. faint luminous
3. presence of ozone which is detected by odour
Which of these is/are correct?