Media Summary: The ratio of \( \mathrm{e} / \mathrm{m} \) for a cathode ray: (a) Varies with a gas in a discharge tube. (b) Is fixed. (c ... Which of the following facts is not true? (a)
If Mathrm E Mathrm M - Detailed Analysis & Overview
The ratio of \( \mathrm{e} / \mathrm{m} \) for a cathode ray: (a) Varies with a gas in a discharge tube. (b) Is fixed. (c ... Which of the following facts is not true? (a)