please answer these questions
Answers
20.) what causes lighting?
ans). The clouds moving in air acquire a charge on their surface due to friction with particles of air. As the surface area of cloud is very large, the amount of charge accumulated on its surface is very high.
when a charged cloud comes close to another cloud is induces an opposite charge on the later and the accumulated charge tries to move from one cloud to another cloud.
But the air present between them bring a poor conductors of electricity resists the flow of charge between them. when the magnitude of the accumulated charges become very large, the air which is normally a poor conductor of electricity, is no longer to able to resists their flow.
Hence discharge takes place between negative and positive charges which produce streaks of bright light and sound. We see streaks as lighting..