Discussion
The ratio of electric field intensity E and magnetic field intensity H has numerical value in free space :
Answer: B
The ratio E/H in free space is about 377 Ω.
This ratio is the intrinsic impedance of free space:
\[ \begin{aligned} \eta_0 &= \sqrt{\frac{\mu_0}{\varepsilon_0}} \\ &= 120\pi \approx 377\ \Omega \end{aligned} \]
75 Ω is the characteristic impedance of common coaxial cable used for television, and 35 Ω and 225 Ω have no special meaning for plane waves in free space.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development