Discussion
True or false: the reactive part of the complex Poynting vector transfers net energy.
Answer: D
Correct answer: False, the reactive part representing energy that merely oscillates to and fro
In the complex Poynting vector \( \tfrac{1}{2}\mathbf{E}\times\mathbf{H}^{*} \), the real part is the time-averaged power actually transported and the imaginary part is stored energy surging back and forth twice per cycle with no net transfer. Near an antenna the reactive part dominates - that is what the near field is - but it is precisely the part that does not radiate.
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