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प्रश्न
How lightning takes place?
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उत्तर
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Lightning is produced by the discharge of electricity from cloud to cloud or from cloud to ground.
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During thunderstorm, air is moving upward rapidly.
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This air which moves rapidly carries small ice crystals upward.
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At the same time, small water drops move downward.
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When they collide, ice crystals become positively charged and move upward and the water drops become negatively charged and move downward.

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So the upper part of the cloud is positively charged and the lower part of the cloud is negatively charged.
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When they come into contact, electrons in the water drops are attracted by the positive charges in the ice crystals. Thus, electricity is generated and lightning is seen.
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Sometimes the lower part of the cloud which is negatively charged comes into contact with the positive charges accumulated near the mountains, trees, and even people on the earth. This discharge produces a lot of heat and sparks that result in what we see as lightning.
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संबंधित प्रश्न
Suggest three measures to protect ourselves from lightning.
The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.
Explain why it is not safe to go out with an umbrella when there is heavy rain, lightning or thunder.
What are the remedial measures for the following calamity:
Lightning strike
______ is a device that protects building from lightning strike.
During the construction of a building, the lightning conductor was left hanging in the air by mistake. Would the lightning conductor be still effective? Explain.
If air and cloud were good conductors of electricity, do you think lightning could occur? Explain.
You might have observed on a dry day that when you touch the screen of a television or computer monitor (with picture tube), you get a slight shock. Why does it happen?
______ extreme heat will vaporize the water inside a tree, creating steam that may burn out the tree.
Assertion: People struck by lightning receive a severe electrical shock.
Reason: Lightning carries very high voltage.
