Question on induced emf in a loop

Click For Summary
The discussion revolves around a high school AP student's question about calculating induced electromotive force (emf) in a square loop of wire within a magnetic field. The loop has sides measuring 20 cm, and the magnetic field is directed into the page with an initial strength of 0.750 T, decreasing at a rate of -0.0350 T/s. The student initially sought help but later clarified the parameters of the problem, which are crucial for determining the changing magnetic flux. The back of the book provides the answer of 1.40 x 10^-4 Volts, confirming the importance of including all details in physics problems to avoid confusion. Clear communication of problem specifics is essential for accurate assistance in physics.
Giuseppe
Messages
42
Reaction score
0
Hey, I'm in a high school AP class and am stuck! Can anyone help me with this problem concerning induced emf? I would surely appreciate it.

There is a loop of wire, shaped like a square. Each side is 20 cm long.
There is a magnetic field directed into the page.

What would be the way of finding out what the induced emf in the loop. The back of the book says that the answer is 1.40 x 10^-4 Volts.
 
Physics news on Phys.org
That magnetic field must produce a varying magnetic flux.So how about telling the whole story...?

Daniel.
 
Its ok, I found out how to do it. I forgot to mention that the Magnetic field has an initial magnitude of .750 T, and is decreasing at a rate of -.0350 T/S (there's your reason for changing magnetic flux) :approve:
 
Please,next time,write the text of the problem.That way,we'd avoid confusions or misunderstandings...

Daniel.
 
no problem.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

Similar threads

  • · Replies 3 ·
Replies
3
Views
3K
Replies
1
Views
1K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 8 ·
Replies
8
Views
4K
  • · Replies 7 ·
Replies
7
Views
955
  • · Replies 2 ·
Replies
2
Views
2K
Replies
11
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K