Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
119 views
in General by (239k points)
closed by

A short current element has length l = 0.03 λ, where λ is the wavelength. The radiation resistance for uniform current distribution is


1. 0.072π2 Ω
2. 80π2 Ω
3. 72 Ω
4. 80 Ω

1 Answer

0 votes
by (237k points)
selected by
 
Best answer
Correct Answer - Option 1 : 0.072π2 Ω

Concept:

Radiation Resistance (Rrad) of any Antenna is

\({R_{rad}} = 80{\pi ^2}{\left[ {\frac{{dl}}{\lambda }} \right]^2}{\rm{\Omega }}\)

Where, \(\lambda = \frac{C}{f}\)

f = frequency

dl = length of Antenna

Calculation:

Given dl = 0.03 λ

\({R_{rad}} = 80{\pi ^2}{\left[ {\frac{{0.03\lambda }}{\lambda }} \right]^2}\)

Rrad ⇒ 0.072π2 Ω

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...