A Proton Is Moving Perpendicular to a Magnetic Field At 3.0

A proton is moving perpendicular to a magnetic field at $3.0 \times 106 \mathrm{~m} / \mathrm{s}$ and experiences a magnetic force of magnitude $2.5 \times 10^{-16} \mathrm{~N}$ . What is the magnitude of the magnetic field?

A) $3.8 \times 10^{-2} \mathrm{~T}$
B) $1.9 \times 10^{-3} \mathrm{~T}$
C) $2.6 \times 10^{-4} \mathrm{~T}$
D) $0.52 \mathrm{~T}$
E) $5.2 \times 10^{-4} \mathrm{~T}$