Question

The value of e/m for anode rays is:

• A. Same for all gases
• B. Different for different gases
• C. Has a value of 1
• D. Has a value of $1.6\times {10}^{-19}$

Answer 1

The correct option is B Different for different gases

The value of e/m is different for different gases since the value of atomic masses of gases used in the discharge tubes are different. So the mass of anode ray particles also varies.