Greater the height of a T.V. transmitter antenna, greater is its coverage. Prove it.

Assertion : Coagulation power of Al^(3+) is more than Na^(+) . Reason : Greater the valency of the flocculating ion added greater is its power to cause precipitation (Hardy Schulze rule) .

True or False : Greater the flocculation value of an electrolyte, greater is its coagulating power.

The emf of a cell is always greater than its terminal voltage. Why?

A T.V. tower has a height of 80 m. By how much the height of tower be increased to triple its coverage range?

Is it necessary for a transmitting antenna to be at the same height as that of the receiving antenna for line-of-sight communication? A TV transmitting antenna is 81m tall. How much service area can it cover if the receiving antenna is at the ground level?