LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #16   Report Post  
Old February 12th 11, 09:15 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Oct 2009
Posts: 707
Default A small riddle, just for fun


Uzytkownik "Richard Clark" napisal w wiadomosci
...
wrote:
To be polarized must be the two poles (nodes)

The tip of a monopole and its base are its two nodes. A monopole is
polarized.

This is a very simple lesson to learn.


but, but, but, the base is a voltage minimum, not the opposite peak
voltage of the top!!! how can that form two nodes to make the
electrons jump opposite directions? this just can't be true! this
must only be half polarity polarisation.


What? Is this Oliver Twist in reverse polish notation?

"Please, sir, can I have another node?"

Yes, you have fully anticipated an objection in its juvenile form.
This can be countered (after asking for a hand to be held out for
switching):
Pick any potential reference point along the
length of the quarter wave monopole;
every point above it will have the opposite polarity
of any point below it - ergo, two nodes are described
each on either side of the reference.


Such situation is also close to the base. But there no voltage. No voltage
no field emission. On the quarter wave monopole is only one place with very,
very high voltage. The dipole has the two.

I hope I don't have to explain that using batteries and resistors (it
may present a challenge in introducing advanced electronic concepts).


The "shape" of the node effects the emission. Thin wire radiate in different
direction than a hat .
But in the elongated node every point have the same polarity.

Faraday is great.
S*


 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Small versatile TNC Steve Stivers Equipment 0 November 30th 06 03:19 AM
WTB: SMALL TRANSFORMER Heytubeguy Boatanchors 2 April 21st 05 04:13 AM
Small CB fs CB 2 July 18th 04 02:27 AM
small CB fs CB 1 July 7th 04 04:20 AM
WTB-small amp B.Peter Treml-K8PT Swap 0 November 23rd 03 11:07 PM


All times are GMT +1. The time now is 06:52 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017