If a charged particle kept at rest experiences an electromagnetic force                 

           

$$\begin{gathered} Case\_1 \\ If E\ne 0;B=0, then due to the electric field, \\ the force acts on the particle \\ Case\_II \\ If E\ne 0 and If B\ne 0 and F_e=F_m then also electromagnetic force \\ will acts on the particle \end{gathered}$$