Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The dielectric constant of air is 1.006. The speed of Electromagnetic Wave travelling in air is <img alt="a \times 10^8 \mathrm{~ms}^{-1}" src="https://entrancecorner.oncodecogs.com/gif.latex?

The dielectric constant of air is 1.006. The speed of Electromagnetic Wave travelling in air is a \times 10^8 \mathrm{~ms}^{-1}  where a is about

Option: 1

3


Option: 2

3.88


Option: 3

2.5


Option: 4

3.2


Answers (1)

best_answer

For an Electromagnetic Wave (in vacuum),
Velocity \mathrm{c=\frac{1}{\sqrt{\mu_0 \varepsilon_0}}=3 \times 10^8 \mathrm{~ms}^{-1}}
Air acts almost as vacuum, hence a=3 (approx)

Posted by

shivangi.shekhar

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

BTech aspirant from north-east or UT? Apply for CSAB NEUT counselling 2025 today
anam-khan

JoSAA round 2 cut-off 2025 out; BTech closing ranks for top engineering courses at IITs
anam-khan

Goa Engineering Admission 2025: 1,415 eligible for BE seats; merit list on June 27

Latest Question