Millikan Oil Drop Experiment

1. Introduction

Millikan Oil Drop Experiment measured the elementary electric charge e.

e = 1.602 x 10^-19 C

2. Theory & Motion Equations

• •
  Terminal velocity under gravity alone: v1 = (2/9) * r^2 * (rho - sigma) * g / eta
• •
  Terminal velocity under electric field: v2 = (qE - mg) / (6pieta*r)