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Question

Corona effect in transmission can be detected by
1. hissing sound
2. the faint luminous glow which is blue in colour
3. presence of ozone which is detected by odour
Which of these is/are correct?

A
only 1 and 2
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B
only 2
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C
only 1 and 3
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D
1, 2 and 3
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Solution

The correct option is D 1, 2 and 3
1, 2 and 3

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