Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • An EM wave radiates outwards from a dipole antenna, with as the amplitude of its electric field v

An EM wave radiates outwards from a dipole antenna, with \mathrm{E}_0 as the amplitude of its electric field vector. The electric field \mathrm{E}_0 which transports significant energy from the source falls off as:
 

Option: 1

\frac{1}{\mathrm{r}^3}


 


Option: 2

\frac{1}{\mathrm{r}^2}
 


Option: 3

\frac{1}{\mathrm{r}}
 


Option: 4

Remains constant


Answers (1)

best_answer

From a dipole antenna, the electromagnetic waves are radiated outwards.
The amplitude of electric field vector \left(\mathrm{E}_0\right) which transports significant energy from the source falls off inversely as the distance (r) from the antenna i.e., \mathrm{E}_0 \propto \frac{1}{\mathrm{r}}.

Hence option 3 is correct.

Posted by

Irshad Anwar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2026: NIT Rourkela records higher closing ranks in CSE, ECE, AI; core engineering branches stable
anam-khan

JEE Main 2026: IIT Delhi’s CSE, EE most opted; last 2 year’s closing ranks for all categories
anam-khan

Must provide CBSE 11th registration numbers to JEE Mains aspirants, board tells schools

Latest Question