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JEE Main202120 Jul 2021Morning ShiftPhysicsMagnetic Effects of CurrentActual

A deuteron and an alpha particle having equal kinetic energy enter perpendicular into a magnetic field. Let r d and r α be their respective radii of circular path. The value of r d r α is equal to:

Options

  1. A1 2
  2. B2
  3. C1
  4. D2

Correct answer

B. 2

Step-by-step solution

r = m v q B = 2 m k q B r d r α = m d m α q α q d = 2 4 2 1 = 2 Hence option ( 2 ) .

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