Can you add flux contributions?

  • Thread starter Thread starter minifhncc
  • Start date Start date
  • Tags Tags
    Flux
AI Thread Summary
The discussion focuses on whether flux contributions from multiple coils can be added similarly to magnetic fields. A user questions if the change in flux through each turn of a second coil wrapped around a material is BA/10 or BA when a first coil is activated. It is clarified that if the total change in flux in the second coil is BA, then each turn experiences BA/10. This creates confusion regarding how transformers operate, as the user recalls being taught that each coil experiences the same change in flux, which is essential for voltage transformation. The conversation highlights the complexities of understanding flux behavior in electromagnetic systems.
minifhncc
Messages
46
Reaction score
0
Hello,

I've got a question regarding flux.

Can you add flux contributions like you can add magnetic fields together?

To illustrate my point, consider a single coil wrapped around a material that conducts flux. A 10 coil is wrapped around the same material. [like a transformer]

When I turn the first single coil on, it produces a magnetic field. So it could cause a change in flux in the 2nd coil (say BA)...

Does the flux of each coil of the second coil change by BA? or by BA/10? I'm a bit confused by this :(

Logic would tell me that it's BA/10 so the total change in flux is BA... or can't you add flux like that? Because, if you actually do that then it defies the logic how transformers work ...

Thanks
 
Physics news on Phys.org


If the total change in flux in the second coil is BA, then the change in flux through each turn would be BA/10.
 


graphene said:
If the total change in flux in the second coil is BA, then the change in flux through each turn would be BA/10.

Then how does a transformer work? Because I think my Physics teacher said that the change in flux for each coil is the same, hence that's why the voltage can be stepped up...
 


Hi,

Also, if the first coil produces a magnetic field of B, then the flux through each coil of the second coil would be BA, wouldn't it?
 


yes.
 


graphene said:
yes.

But that's contrary to what you said before :S
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

EMF induced by a magnet falling through a coil
Replies
4
Views
3K
Flux direction through core
Replies
6
Views
484
B Not sure about the magnetic flux (phi) depending on a cosine function
Replies
9
Views
1K
Calculating Flux Linkage in a Rotating Rectangular Coil
Replies
4
Views
3K
Magnetic flux linkage and area as a vector
Replies
1
Views
4K
Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
Replies
1
Views
1K
I Need a good idea : 3D simulation of Inductive wireless power transfer
Replies
6
Views
2K
Flux density expressions at solenoid centre
Replies
19
Views
2K
Problem with calculating magnetic flux for a single coil of wire.
Replies
8
Views
4K
I Mutual inductance in a transformer
Replies
16
Views
4K

Hot Threads

Recent Insights

Back
Top