Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The electromagnetic waves travel in a medium at a speed of  <img alt="\mathrm{2.0\times10^{8}m/s}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7B2.0%5Ctimes10%5E%7B8%7Dm/s%7

The electromagnetic waves travel in a medium at a speed of  \mathrm{2.0\times10^{8}m/s}. The relative permeability of the medium is \mathrm{1.0} . The relative permitivity of the medium will be :

Option: 1

\mathrm{2.25}


Option: 2

\mathrm{4.25}


Option: 3

\mathrm{6.25}


Option: 4

\mathrm{8.25}


Answers (1)

best_answer

\mathrm{V=2 \times 10^{8} \mathrm{~m} / \mathrm{s}}\\

\mathrm{\mu_{r}=1}\\

\mathrm{\varepsilon_{r}=?}

\mathrm{\frac{C}{\sqrt{\mu_{r} \varepsilon_{r}}}=V} \\

\mathrm{\frac{3 \times 10^{8}}{\sqrt{\mu_{r} \varepsilon _{r}}}=2 \times 10^{8}} \\

\mathrm{\frac{3}{2}=\sqrt{\mu_{r} \varepsilon_{r}}} \\

\mathrm{\frac{9}{4}=1 \times \varepsilon _{r}} \\

\mathrm{\varepsilon_{r}=2.25}

Hence the correct answer is option 1.

Posted by

Divya Prakash Singh

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