AIIMS 2007
- Exam
- AIIMS
- Year
- 2007
- Subject
- Physics
- Chapter
- Communication System
AIIMS 2007 · Physics · Communication System
In communication with help of antenna if height is doubled then the...
In communication with help of antenna if height is doubled then the range covered which was initially would become
Options
- A(\sqrt{2} r)
- B
- C
- D
Correct answer
A. (\sqrt{2} r)
Step-by-step solution
Range (r=\sqrt{2 R h})
where is the radius of the earth and is the height of an antenna
(\therefore \quad r^{\prime}=\sqrt{2 R(2 h)}=\sqrt{2}(\sqrt{2 R h})=\sqrt{2} r)