A particle of mass \(2.2\times 10^{-30}\,\text{kg}\) and charge \(1.6\times 10^{-19}\,\text{C}\) is moving at a speed of \(10\,\text{km s}^{-1}\) in a circular path of radius \(2.8\,\text{cm}\) inside a solenoid. The solenoid has \(25\,\text{turns/cm}\) and its magnetic field is perpendicular to the plane of the particle's path. The current in the solenoid is
Take \(\mu_0=4\pi\times 10^{-7}\,\text{H m}^{-1}\).