How to solve the following ?
In Millikan's oil drop experiment on applying a vertically upward electric field an oil drop (of mass m) moves vertically downward with certain terminal speed. On applying double the electric field in horizontal direction the drop moves making #45^@ # with vertical. Neglecting buoyant force due to the air, what is the viscous force acting on the drop in first case ??
In Millikan's oil drop experiment on applying a vertically upward electric field an oil drop (of mass m) moves vertically downward with certain terminal speed. On applying double the electric field in horizontal direction the drop moves making
1 Answer
In first case the droplet of mass
If the viscous force exerted by air be
At this state of downard motion of the droplet with terminal velocity
Combining [1] and #[2] we get