Name the device used to secure tall buildings from lightning. Explain its construction and working.
A. Lightning rod is a device used to secure tall buildings ^rom the effect of lightning.
A metallic rod taller than the height of the building to be protected is installed in the walls of the building during its construction. One end of the rod is kept out in the air and the other is fixed in the ground. This provides easy route for transfer of electric discharge to the ground.