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JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Cathode Rays and Positive Rays

  • question_answer
    \[{{O}^{++}},\ {{C}^{+}},\ H{{e}^{++}}\] and \[{{H}^{+}}\] ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest    [RPMT 2003]

    A)            \[{{O}^{++}}\]                     

    B)            \[{{C}^{+}}\]

    C)            \[H{{e}^{++}}\]                   

    D)            \[H_{2}^{+}\]

    Correct Answer: B

    Solution :

               \[2r=\frac{2mv}{qB}\,\Rightarrow 2r\propto \frac{m}{q}\] Þ          \[\frac{m}{q}\] is maximum for \[{{C}^{+}}\]


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