An electron having kinetic energy of \(100\,\text{eV}\) circulates in a path of radius \(10\,\text{cm}\) in a magnetic field. The magnitude of magnetic field \(|\vec{B}|\) is approximately \([\text{Mass of electron}=0.5\,\text{MeV}\,C^{-2},\text{ where }C\text{ is the velocity of light}]\).