A particle of mass ${10}^{-3}$ kg and charge 1.0 c is initially at rest At time t=0 the paritcle comes under the influence of an electric field $\hat{E}\left(t\right)=E_0\sin \omega t\hat{i}$ where $E_0=1.0N{C}^{-1}$ and $\omega ={10}^{3}rad{s}^{-1}$ consider the effect of only the electrical force on the particle .Then the maximum speed in m $s^{-1}$ attained by the paritcle at subsequent times is ______________

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