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Surface Tension

Why is air po...

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Why is air positively charged and the water droplets negatively charged in the cloud?

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Q. Statement 1: The positive charges collect near the upper edges of the clouds and the negative charges accumulate near the lower edges.
Statement 2: The charge separation is caused due to vigorous upward movement of air currents and the downward movement of water droplets.

The clouds consist of charged particles of water dispersed in the air. Some of them are positively charged, others are negatively charged. When positively charged clouds come closer, they cause lightning and thundering whereas when positive and negative charged colloids come closer, they cause heavy rain by aggregation of minute particles. It is possible to cause artificial rain by throwing electrified sand or silver iodide from an aeroplane and thus, coagulation the mist hanging in the air.

Electrical chimneys are made on the principle of :

The clouds consists of charged particles of water dispersed in air. Some of them are positively charged, others are negatively charged. When positively charged clouds come closer, they cause lightening and thundering whereas when positive and negative charged colloids come closer, they cause heavy rain by aggregation of minute particles. It is possible to cause artificial rain by throwing electrified sand or silver iodide from an aeroplane and thus, coagulation the mist hanging in air.

Clouds are colloidol solution of :

Which of of the given statements are correct regarding clouds during a thunderstorm?

1. Upper parts of the clouds are positively charged.

2. Cloud is electrically neutral (no charge) everywhere.

3. Upper parts of clouds are negatively charged.

4. Lower parts of clouds are negatively charged.

Q. Which of the following statements are true regarding clouds during a thunderstorm?
1. Upper parts of the clouds are positively charged.
2. Cloud is electrically neutral (no charge) everywhere.
3. Upper parts of clouds are negatively charged.
4. Lower parts of clouds are negatively charged.

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