• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Waves on an antenna problem

  • Thread starter vande060
  • Start date
186
0
1. Homework Statement
Your automobile antenna is 1m in length and is fixed at one end, free at the other. When you drive on an
uneven road, waves can be excited on the antenna. Compute the wavelengths of the four longest wavelength standing
waves that your antenna will allow.



2. Homework Equations
for a standing wave i know these equations exist

λn =(2/n )*L

also A' = -A

furthermore, I know that the fixed end of the antenna could be considered to have infinite density



3. The Attempt at a Solution

the four longest wavelengths should be:

2/1 * 1 = 2 m
2/2 * 1 = 1 m
2/3 * 1 = 2/3m
2/4 * 1 = .5m

is this even close?
 
50
0
1. Homework Statement
Your automobile antenna is 1m in length and is fixed at one end, free at the other. When you drive on an
uneven road, waves can be excited on the antenna. Compute the wavelengths of the four longest wavelength standing
waves that your antenna will allow.
If it is fixed at one end and free at the other, one end must be a node, and the other end must be an antinode.

Try to draw what the acceptable standing waves would look like; that will help you to find their wavelengths.
 

Related Threads for: Waves on an antenna problem

  • Posted
Replies
3
Views
2K
Replies
25
Views
10K
Replies
1
Views
828
Replies
1
Views
9K
  • Posted
Replies
1
Views
582
Replies
2
Views
10K
Replies
5
Views
1K
  • Posted
Replies
3
Views
1K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top