The clouds consist of charged particles of water dispersed in air. Some of them are + vely charg...

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The clouds consist of charged particles of water dispersed in air. Some of them are + vely charged, others
\( \mathrm{P} \) are negatively charged. When + vely charged clouds

W come closer they have cause lightening and thundering whereas when + ve and -ve charged colloids closer they cuase heavy rain by aggregation of minute particles. It is possible to cause artificial rain by throwing ectectrified sand or silver iodide from an aeroplane and zhe coagulation the mist hanging in air.
EElectrical chimneys are made on the principle of
A) Electroosmosis
(B) Electrophoresis
Coagulation
(D) All of these
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