2. Sample Papers
  3. 9th Class
  4. Science

9th Class Science Sample Paper Science Sample Paper-4

  • question_answer
    e/m ratio of an electron is about ____ times that of proton.

    A) 10                    

    B) 100        

    C) 1000                

    D) 2000

    E) None of these

    Correct Answer: D

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