Question

The e/m value for cathode rays:

• A. varies with the nature of the gas
• B. does not vary with the nature of gas
• C. was not determined by J. J. Thomson
• D. both (b) and (c) are correct

Answer 1

Answer: (B)

does not vary with the nature of gas

The cathode rays consist of only electrons. Thus their e/m value does not change with change of gas. Hence e/m value does not vary with nature of gas. Thus correct option is 'B'.