Question

In communication with help of antenna if height is doubled, then the range covered with which was initially r would become

 (a)\(\sqrt{2r}\)

(b) 3r

(c) 4r

(d) 5r

Answer 1

(a) \(\sqrt{2r}\)

Initial range, r – \(\sqrt{2Rh}\)

When height fo antenna is doubled r' = \(\sqrt{2R \times 2h} - \sqrt{2r}\)