TS EAMCET Medical 8 May 2019 Shift 1 Paper

Consider a horizontal sheet with charge density 5 × 10−6 C/m2. A particle of mass 8 × 10−6 g is chopped from a certain height onto this sheet. The number of elections that should be removed from this particle so that it stays close to the sheet without falling on it is
(Assume g = 10 m/s2 and

1

4πε0

= 9 × 109 Nm2C−2)