Q. The vacuum inside the glass bulb of a mercury arc rectifier is of the order of (Solved)

1. 5 x 10-3 cm of Hg

2. 5 x 10-4 cm of Hg

3. 5 x 10-5 cm of Hg

4. 5 x 10-8 cm of Hg.

  • c. 5 x 10-5 cm of Hg
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