Physics Question: Determining Magnetic Flux & Induced EMF

  • Thread starter Thread starter tstar2
  • Start date Start date
  • Tags Tags
    Induction Law
AI Thread Summary
To determine the magnetic flux through a loop due to a current "I," first calculate the magnetic field generated by the current using the appropriate formula for an infinite straight wire. Then, integrate this magnetic field over the area of the loop, which is rectangular in this case, simplifying the integration process. For calculating the induced EMF when the current changes over time, use Faraday's law of electromagnetic induction, considering the rate of change of magnetic flux. The direction of the induced current in the loop can be determined using Lenz's law, which states that the induced current will oppose the change in magnetic flux. Understanding these principles will help solve the physics problem effectively.
tstar2
Messages
1
Reaction score
0
can someone pls help me on a physics question??...i've read my text 2 times and still can't figure this out!...how do you determine the magnetic flux through a loop due to a current "I"??...it's a loop under a wire carring a current...then calculate the induced emf when the current is changing with time according to I=a+bt, a and b are constants...b=10.0A/s h=1cm, w=10cm, l=100cm...then determine the direction of the current in the loop (rectangle)...if anyone can help me with this, it would be greatly appreciated:)...thanks in advance for your help...
 
Physics news on Phys.org
Originally posted by tstar2
...how do you determine the magnetic flux through a loop due to a current "I"??...it's a loop under a wire carring a current...
Find the magnetic field generated by the current (there's probably a formula in your book for the magnetic field do to an infinite straight line of current). Integrate that over the area of the loop. Is the loop a rectangle? That would simplify the integration tremendously.
 

Thread 'Maxwell stress tensor'

This is from Griffiths' Electrodynamics, 3rd edition, page 352. I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##. In matrix form, this tensor should look like this...
View full post »
Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Please can anyone either:- (1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges? Or alternatively (2) point out where I have gone wrong in my method? I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula. Here is my method and results so far:- This...
View full post »

Similar threads

I Questions about cancelation of induced EMF and minimizing eddy currents
Replies
4
Views
2K
I How Does the Maxwell-Faraday Law Apply to Stealth Magnets and EMF Induction?
Replies
27
Views
2K
I Motional EMF in Faraday disc, co-rotating magnet axial mean flux
Replies
5
Views
156
I How induction works within a coil (nuances of it)
Replies
6
Views
2K
I Faraday induction in constant B field, with non-conduction wires
Replies
2
Views
1K
Why does a change of magnetic flux induce an EMF?
Replies
7
Views
3K
An Interesting Question on Faraday's Law of Electromagnetic Induction
Replies
11
Views
3K
I Mutual inductance in a transformer
Replies
16
Views
4K
Faraday's Law with Zero Resistance Current Loop
Replies
2
Views
7K
B Experiment issues (electromagnetism)
Replies
42
Views
2K

Hot Threads

Recent Insights

Back
Top