Faraday's Law and magnetic flux

AI Thread Summary
The discussion centers on whether an induced current will occur in a circular coil when a magnetic field changes, given that the magnetic field does not pass through the coil. One participant argues that no induced current will result because the magnetic field is not intersecting the coil. Another perspective suggests that if the magnetic field is oriented along the axis of the coil, a potential could still be generated, similar to isolation transformers. The conversation highlights the importance of the magnetic field's orientation and the coil's configuration in determining the presence of induced current. Ultimately, the conclusion is that the relationship between the coil and the magnetic field is crucial for understanding induced current.
rickyw2777
Messages
9
Reaction score
2
Homework Statement
If there is a circular coil of radius r0 and a circular region of magnetic field of radius r1. Given that them have the same center and r0>r1, if the magnetic field changed its magnetic field strength, will there still be a induced current?
Relevant Equations
E=delta Phi/delta t
I believe that there will not be a induced current because the magnetic field does not pass through the coil.
 
Physics news on Phys.org
Can you make a nice drawing that shows how you came to the conclusion?
 
rickyw2777 said:
Homework Statement: If there is a circular coil of radius r0 and a circular region of magnetic field of radius r1. Given that them have the same center and r0>r1, if the magnetic field changed its magnetic field strength, will there still be a induced current?
Relevant Equations: E=delta Phi/delta t

I believe that there will not be a induced current because the magnetic field does not pass through the coil.
Assuming that the field direction is along the axis of the coil (not defined in the question as stated here*), there will be a potential generated in the coil. This is exactly what happens in isolation transformers. The current depends on how the coil is connected.
*My assumption is that the coil and the field circle are coplanar, and the field is perpendicular to the disc of the circle.
However, you could read this as the field being along the circumference of the circle, in which case your original thoughts would apply.
 
rickyw2777 said:
Homework Statement: If there is a circular coil of radius r0 and a circular region of magnetic field of radius r1. Given that them have the same center and r0>r1, if the magnetic field changed its magnetic field strength, will there still be a induced current?
Relevant Equations: E=delta Phi/delta t

I believe that there will not be a induced current because the magnetic field does not pass through the coil.
I wonder where does the homework and you are looking at ? No charge, no current.
 
Last edited:

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Modelling a metal detector using eddy currents from Non-Destructive Testing
Replies
1
Views
905
Why is the value of EMF generated by a generator not zero at t = 0 s?
Replies
2
Views
1K
Magnetic energy density, self-inductance of coaxial cylindrical shells
Replies
10
Views
1K
How does an eddy current brake work exactly?
Replies
2
Views
2K
Making sense of sequence of ideas in MIT OCW's 8.02 notes on Faraday
Replies
1
Views
1K
Eddy currents in Faraday's Law Experiment
Replies
3
Views
2K
EMF induced by a magnet falling through a coil
Replies
4
Views
3K
How Does Lenz's Law Explain the Jumping Ring Phenomenon?
Replies
8
Views
2K
Flux linking (and de-linking?)
Replies
6
Views
874
EMF shielding using a conductor
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top