Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii R₁ and R₂ respectively. The ratio of masses of X and Y is
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Magnetic radius after acceleration depends on square root of mass.
Step 1: From acceleration through potential V:
(1)/(2)mv² = qV
⟹ v = √((2qV)/(m))
Step 2: Radius in magnetic field:
R = (mv)/(qB)
⟹ R ∝ √(m)
Step 3: Hence,
(mX)/(mY) = ((R₁)/(R₂))²