A charge particle of 2 μ C accelerated by a potential difference of 100V enters a region of uniform magnetic field of magnitude 4 mT at right angle…

A charge particle of $\displaystyle 2 \mu \mathrm{C}$ accelerated by a potential difference of 100V enters a region of uniform magnetic field of magnitude $\displaystyle 4$ mT at right angle to the direction of field. The charge particle completes semicircle of radius $\displaystyle 3$ cm inside magnetic field. The mass of the charge particle is $\displaystyle \_\_\_\_$ $\displaystyle \times 10^{-18} \mathrm{~kg}$.