Machine-translated by Google. Questions are authored in English.
Top

Discussion

The proportion of upward initiated flashes rises with structure height because

  • A.upward flashes carry considerably less current
  • B.field enhancement at the tip grows with height
  • C.tall structures attract more storms towards them
  • D.the air is appreciably more conductive at height

Answer: B

A tall grounded conductor concentrates the ambient field enough to launch its own leader. Above about a hundred metres upward flashes become an appreciable fraction. Very tall structures are struck almost exclusively upward.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.