The negatively charged particles are

Name the negatively charged particles present in the atoms of all the elements.

The negatively-charged particle present in an atom is called _____

Answer the following : Moving negatively charged particles are the electrons . Can this negative charge be made to flow ?

A thin fixed of radius 1 metre has a positive charge 1xx10^-5 coulomb uniformly distributed over it. A particle of mass 0.9 gm and having a negative charge of 1xx10^-6 coulomb is placed on the axis at a distance of 1cm from the centre of the ring. Show that the motion of the negatively charged particle is approaximately simple harmonic. Calculate the time period of oscillations.