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Magnetics question

2021 · 18 Mar · Shift 2 · Q58
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  5. /2021 · 18 Mar · Shift 2 · Q58

Magnetics question

2021 · 18 Mar · Shift 2 · Q58

JEE MainPhysicsMagneticsMCQ+4 / −1
A proton and an α\alphaα-particle, having kinetic energies Kp and K α\alphaα respectively, enter into a magnetic field at right angles. The ratio of the radii of trajectory of proton to that of α\alphaα-particle is 2 : 1. The ratio of Kp : K α\alphaα is :
  1. A
    8 : 1
  2. B
    4 : 1
  3. C
    1 : 8
  4. D
    1 : 4
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