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

Induced emf between theh ends of an antenna

  • Thread starter mike1234
  • Start date
  • #1
5
0

Homework Statement


A car with a vertical radio antenna 85cm long drives due east 25 m/s. The Earth's magnetic field at this location has a magnitude of 5.9 * 10-5 T and points northward, 72 degrees below the horizontal. a) Is the top or the bottom of the antenna at the higher potential? b) Find the induced emf between the ends of the antenna


Homework Equations


E=Bvl


The Attempt at a Solution



I started with E=Bvl where E=5.9 *10-5T *(cos 18 or 108 not sure)* 25m/s * .85m and get a value of 1.19mV with cos 18. however not sure should I use 108 instead but don't know the reasoning help someone
 

Answers and Replies

  • #2
5
0
does no one know the answer to this question
 
  • #3
Doc Al
Mentor
44,892
1,144
Hint: To use that formula, you need the component of B perpendicular to the antenna.
 

Related Threads on Induced emf between theh ends of an antenna

Replies
2
Views
2K
  • Last Post
Replies
3
Views
388
  • Last Post
Replies
2
Views
12K
Replies
1
Views
2K
Replies
3
Views
4K
Replies
2
Views
16K
  • Last Post
4
Replies
88
Views
4K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
1
Views
2K
Top