A proton and an α-particle, moving with the same velocity, enter a uniform magnetic field, acti

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A proton and an &#945;-particle, moving with the same velocity, enter a uniform magnetic field, acting normal to the plan of their motion. the ratio of the radii of the circular paths described by the proton and &#945;-particle is :

Accepted Answer

When a charged particle enters a field, it takes a circular enters a field, it takes a circular path. The radius of circular path is given by the relation
r =
For proton, r₁ =
For α- particle, r₂ =
⇒ r₁ : r₂ : : 1 : 2

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