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How thunder and lightning happend?

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How thunder and lightning happend?

Posted by Swayam Shree Sahu 6 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 6 years, 11 months ago

During a thunderstorm, the air currents move upward and water droplets move downward. These movements take at very fast pace and it results in separation of charges in the clouds.
The positive charges accumulate at the upper edges of the clouds and the negative charges accumulate at the lower edges of the clouds. Scientists are yet to understand the exact reason for this.
At the same time, the ground becomes positively charged.
Air is a bad conductor of electricity under normal circumstances. But when the amount of charge becomes too much in the clouds, the air is not in a position to hold on to this charge. As a result, the electric charge is transferred to the ground. This appears like a bright streak of light across the sky; which lasts for a few seconds.

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