A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to their direction of motion. The ratio of the radii of the circular paths described by the alpha particle and proton is

Option 1 -

1 : 4   

Option 2 -

4 : 1    

Option 3 -

2 : 1 

Option 4 -

1 : 2

0 2 Views | Posted 2 months ago
Asked by Shiksha User

  • 1 Answer

  • P

    Answered by

    Payal Gupta | Contributor-Level 10

    2 months ago
    Correct Option - 3


    Detailed Solution:

     r=mvqB

    rα=mαvqαB

    rP=mPvqPB

    rαrP=mαqPmPqα=mαmP (qPqα)

    =4mm (q2q)=2:1

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