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NEET Sample Paper NEET Sample Test Paper-43

  • question_answer
    A proton and an alpha particle having same momentum enter a magnetic field at right angles to it. If \[{{r}_{1}}\] and \[{{r}_{2}}\] be their radii respectively then value of \[{{r}_{1}}/{{r}_{2}}\] is -

    A) 1                                 

    B) 2

    C) 1/2                               

    D) ¼

    Correct Answer: B

    Solution :

    \[r=\frac{mv}{qB}=\frac{p}{qB}\] \[\frac{{{r}_{q}}}{{{r}_{a}}}=\frac{2e}{e}=\frac{2}{1}\]


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