$A$ particle of mass $m = 1.67 \times 10^{-27} \, kg$ and charge $q = 1.6 \times 10^{-19} \, C$ enters a region of uniform magnetic field of strength $B = 1 \, T$ as shown in the figure. The angle of incidence is $45^{\circ}$. The radius of the circular portion of the path is:

  • A
    $0.104 \, m$
  • B
    $0.148 \, m$
  • C
    $0.074 \, m$
  • D
    None of the above

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