Relationship between emf and magnetic field strength

  • Thread starter mingee kim
  • Start date
  • #1

Homework Statement


See image below.

Homework Equations


motional emf = induced voltage = B L v

The Attempt at a Solution


I thought the answer would be A since there's a direct relationship between EMF and magnetic field strength. The answer is D.
 

Attachments

Answers and Replies

  • #2
TSny
Homework Helper
Gold Member
12,800
3,157
Welcome to PF!

You do not have any motional emf in this problem since the coil is not moving (v = 0).

Try using the most general form of Faraday's law of induction.
 
  • #3
Welcome to PF!

You do not have any motional emf in this problem since the coil is not moving (v = 0).

Try using the most general form of Faraday's law of induction.
Doesn't Faraday's law of induction say the same thing? that emf is related to the rate change of magnetic flux? and magnetic flux = BA cos theta

so the emf is related to the magnetic field strength?
 
  • #4
TSny
Homework Helper
Gold Member
12,800
3,157
Doesn't Faraday's law of induction say the same thing?
I'm not sure what you mean by the "same thing" here.

that emf is related to the rate change of magnetic flux? and magnetic flux = BA cos theta
Yes, good.

so the emf is related to the magnetic field strength?
Would it be more appropriate to say that emf is related to the rate of change of B?
 
  • Like
Likes mingee kim
  • #5
Doesn't Faraday's law of induction say the same thing? that emf is related to the rate change of magnetic flux? and magnetic flux = BA cos theta

so the emf is related to the magnetic field strength?
ropriate to say that emf is related to the rate of change of B?
Ahh, it makes sense now. Thank you!
 

Related Threads on Relationship between emf and magnetic field strength

Replies
0
Views
287
Replies
3
Views
5K
Replies
3
Views
4K
Replies
13
Views
10K
  • Last Post
Replies
2
Views
509
Replies
1
Views
2K
  • Last Post
Replies
1
Views
3K
Top