$A$ proton enters a magnetic field of flux density $1.5 \, Wb/m^2$ with a velocity of $2 \times 10^7 \, m/s$ at an angle of $30^\circ$ with the field. The force on the proton will be

  • A
    $2.4 \times 10^{-12} \, N$
  • B
    $0.24 \times 10^{-12} \, N$
  • C
    $24 \times 10^{-12} \, N$
  • D
    $0.024 \times 10^{-12} \, N$

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