Magnetic flux and direction of induced current

  • Thread starter michaelw
  • Start date
  • #1
80
0
I am really really hoping that the answer is wrong in the back of my book otherwise my entire basis for electricity/magnetism will be shattered :cry:

Basically, there is a picture of a magnetic field going into the page, and there is a coiled loop within this magnetic field. If the magnetic field is decreasing over time, which way will current flow in the loop?

I think that since its decreasing, the coil will induce a current to increase that magnetic field (into the page) and thus, thumb points into the page with right hand, and current flows clockwise (and electrons flow counter clockwise)..

Am I wrong?
 

Answers and Replies

  • #2
quasar987
Science Advisor
Homework Helper
Gold Member
4,780
12
I vote for 'no'.
 
  • #4
3,763
9
michaelw said:
I am really really hoping that the answer is wrong in the back of my book otherwise my entire basis for electricity/magnetism will be shattered :cry:

Basically, there is a picture of a magnetic field going into the page, and there is a coiled loop within this magnetic field. If the magnetic field is decreasing over time, which way will current flow in the loop?

I think that since its decreasing, the coil will induce a current to increase that magnetic field (into the page) and thus, thumb points into the page with right hand, and current flows clockwise (and electrons flow counter clockwise)..

Am I wrong?
you are correct.

Can you tell what your book says ?

marlon
 
  • #5
349
0
michaelw said:
I am really really hoping that the answer is wrong in the back of my book otherwise my entire basis for electricity/magnetism will be shattered :cry:

Basically, there is a picture of a magnetic field going into the page, and there is a coiled loop within this magnetic field. If the magnetic field is decreasing over time, which way will current flow in the loop?

I think that since its decreasing, the coil will induce a current to increase that magnetic field (into the page) and thus, thumb points into the page with right hand, and current flows clockwise (and electrons flow counter clockwise)..

Am I wrong?
If you are looking from the top obviously clockwise and from bottom anticlockwise!
Your concepts are right and thats Lenz Rule,observe the orientation well,sometimes they can confuse.!
 

Related Threads on Magnetic flux and direction of induced current

  • Last Post
Replies
6
Views
16K
  • Last Post
Replies
1
Views
2K
Replies
12
Views
713
  • Last Post
Replies
4
Views
5K
  • Last Post
Replies
1
Views
2K
Replies
1
Views
1K
Replies
2
Views
838
Top