Discussion
The intrinsic impedance of air or vacuum is given by :
Answer: D
The intrinsic impedance is \(z_{0} = \sqrt{\frac{\mu_{0}}{\varepsilon_{0}}}\).
The intrinsic impedance of a medium is the ratio of the electric field to the magnetic field in a plane wave, \(\eta = \sqrt{\mu/\varepsilon}\). For free space:
\[ \begin{aligned} \eta_{0} &= \sqrt{\frac{\mu_{0}}{\varepsilon_{0}}} \\ &\approx 120\pi \approx 377\ \Omega \end{aligned} \]
The other forms are different quantities. \(\frac{1}{\sqrt{\mu_{0}\varepsilon_{0}}}\) is the speed of light \(c\), and \(\sqrt{\mu_{0}\varepsilon_{0}}\) is \(1/c\). \(\sqrt{\varepsilon_{0}/\mu_{0}}\) is the intrinsic admittance, the reciprocal of the impedance.
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