GENERAL KNOWLEDGE

Detailed explanation-1: -Once rain began and wet the string, sparks started to “steam off the key to Franklin’s hand.” With the proof that lightning was indeed electricity, and knowing that an iron rod could be used to attract it, Franklin erected the first lightning rod on the roof of his own house to continue tests.

Detailed explanation-2: -A lightning rod, simply, is a rod attached to the top of a building, connected to the ground through a wire. The electric charge from lightning strikes the rod and the charge is conducted harmlessly into the ground. This protects houses from burning down and people from electrocution.