An electrostatic force F = aeE, is applied externally on the phenomena "Electrostatic electron oscillations perpendicular to B" during under observation in laboratory. Apply the fluid model, obtain the final expression, analyze and explain the results for 1) a=- 1, 2) a= 0, 3) a=+1 "otv]v. = -e(E; + va Ba) + F lat Note: No change in Continuity and Poisson equations.