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:A
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