I read in my school textbook that lightning strikes the ground because the buildings or trees gets charged by induction.so why dosent the static discharge go from the ground to the clouds?
Why does lightning always come from the clouds?
So why doesn't the static discharge go from the ground to the clouds?
It does sometimes.
Lightning is fairly complex, and there a several phases to a typical cloud-to-ground (CG) strike. So even within CG lightning, you have to be pretty specific what exactly you mean by "come from"... Are you referring to the leader or the return stroke?
But to answer your question more generally, there are typically three different types of lightning:
- Cloud to Ground
- Cloud to Cloud