A charged bead is capable of sliding freely through a string held veticlaly in tension .an electric field is applied parallel to the string so that the bead stays at rest at the middle of the string .If the electric field is switched off momentarily and switched on

Options

A. the bead moves downwards and stops as soon as th efield is switched on
B. the bead moved downwards when the field is switched off and moves upwards when the field is
C. the bead moves downwards with constant acceleration till it reaches the bottom of the string
D. the bead moves downwards with constant velocity till it bottotm of the string

Answer

4