The electrification of newly formed clouds of water droplets

A survey of previous work on cloud droplet electrification was carried out. A cloud chamber was constructed and used to generate droplets of radius in the range 1-3 μm. The size and the charge of individual droplets were determined. Positive and negative droplets were observed. The average charge on the droplets was found to be about 5e. Also a photographic method was tried and discussed to determine the charge on the droplets.