9th Class Science Structure of the Atom Question Bank Structure of the Atom

  • question_answer
    Which of the following is true about the \[e/m\] value of positive particles?

    A)  It is constant.

    B)  It depends on the gas taken in the discharge tube.  

    C)  It depends on the nature of cathode and anode taken.

    D)  It depends on the fluorescent material coated on the screen.

    Correct Answer: B

    Solution :

     e/m of the positive particles depends on the gas taken in the discharge tube as these particles are formed by the ionisation of gas molecules taken.


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