Cathode rays are produced when the pressure is of the order of [Ker – McqOptions

MCQOPTIONS

1.	Cathode rays are produced when the pressure is of the order of [Kerala (Engg.) 2002]
A.	2 cm of Hg
B.	0.1 cm of Hg
C.	0.01 mm of Hg
D.	1 \[\mu m\] of Hg
Answer» D. 1 \[\mu m\] of Hg

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