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Cathode rays are produced when the pressure is of the order of

Cathode rays are produced when the pressure is of the order of

Options

(a) 2 cm of Hg
(b) 0.1 cm of Hg
(c) 0.01 mm of Hg
(d) 1μm of Hg

Correct Answer:

0.01 mm of Hg

Explanation:

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