Magnetic flux and induction help

  • #1
latentcorpse
1,444
0
[itex]epsilon=-\frac{d \Phi}{dt}[/itex] where epsilon is the emf. the emf produces a current in the oppostite direction to the loop which gives a magnetic field opposing ther external field B. my notes then say

[itex]\frac{d \Phi}{dt}>0 \Rightarrow \frac{d \Phi_{Induced}}{dt}<0[/itex] but i don't understand this statement, can someone explain it please?
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
9


Changing magnetic flux produces the changing current in the loop. This changing current produces changing magnetic flux which links the loop resulting changing induces magnetic flux in the opposite direction. One is taken as positive and the other is taken as negative.
 
  • #3
latentcorpse
1,444
0


sorry what?

is it basically lenz's law yeah?

the changing magnetic flux causes an electric field round the wire which induces a current round the loop, this current is changing with time and in turn produces a changing magnetic field in the oppostie direction to the original external field and so the induced flux has the opposite sign to the flux of the external field?
 

Suggested for: Magnetic flux and induction help

Replies
2
Views
46
Replies
2
Views
339
Replies
0
Views
666
Replies
8
Views
833
Replies
5
Views
618
Replies
4
Views
577
  • Last Post
Replies
1
Views
421
  • Last Post
Replies
3
Views
1K
Top