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

Quick Question about the mag field of a solenoid

  • Thread starter JamesL
  • Start date
  • #1
33
0
A light bulb and a solenoid are connected in series to a battery. An iron rod is thrust rapidly into the solenoid and later rapidly removed. The bulb:

1)No change in or out
2)No change in, brightens out
3)Dims in, Dims out
4)Brightens in, dims out
5)Brightens in, brightens out
6)remains brighter the entire time
7)Dims in, Brightens out
8)Brightens in, no change out
9)Dims in, no change out
10)no change in, dims out

-----------

Im leanin towards #7, dims as the rod is thrust into the solenoid, and brightens as it is removed. since the iron rod is a conductor, it would draw some of the mag force away from the solenoid (and therefore the battery) thus making it dimmer... and then when it is removed, the bulb would brighten back to its original state....

is this reasoning correct? any help?
 

Answers and Replies

  • #2
33
0
solved. nevermind
 

Related Threads for: Quick Question about the mag field of a solenoid

  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
1
Views
834
Replies
2
Views
3K
  • Last Post
Replies
3
Views
3K
Replies
1
Views
2K
Replies
11
Views
1K
  • Last Post
Replies
5
Views
9K
  • Last Post
Replies
3
Views
3K
Top