Minimum magnetic field detected and measured

AI Thread Summary
The minimum magnetic field that can be detected and measured is often achieved using a Superconducting Quantum Interference Device (SQUID), which can detect magnetic fields down to the quantized magnetic flux level. The discussion also touches on the confusion regarding the term "organ," which is clarified as referring to instruments or devices rather than biological organs. Participants express gratitude for the information shared. Overall, the focus remains on the capabilities of SQUID technology in measuring minimal magnetic fields. Understanding these measurements is crucial for advancements in various scientific fields.
mather
Messages
146
Reaction score
0
hello!

what is the minimum magnetic field that can be detected and measured?

which organ does it?

thanks!
 
Physics news on Phys.org
mather said:
hello!

what is the minimum magnetic field that can be detected and measured?

which organ does it?

thanks!

Sorry, organ?

Zz.
 
ZapperZ said:
Sorry, organ?

Zz.

instrument? device?
 
A SQUID can detect down to the quantized magnetic flux.

http://www.physics.wisc.edu/undergrads/courses/407/experiments/squid/rfSQUID.pdf

Zz.
 
Last edited by a moderator:
thanks!
 

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 Charge movement relative to magnetic field frame dependence/invariance
Replies
5
Views
912
B Measuring electric field vs magnetic field
Replies
8
Views
2K
I Behaviour of Magnetic Fields Underwater
Replies
2
Views
3K
B Experiment issues (electromagnetism)
Replies
42
Views
2K
B Force Exerted on a Conductor by a Homogeneous Magnetic Field
Replies
1
Views
1K
B Why does my toaster hum?
Replies
22
Views
1K
I Relation between electric & magnetic fields in terms of field strength
Replies
41
Views
6K
I Geometry of Magnetic field lines as they approach a magnet pole?
Replies
28
Views
3K
I Is This Correct Description of Magnetic Saturation?
Replies
14
Views
2K
I Does displacement current create a magnetic field? And Lorentz force?
Replies
10
Views
2K

Hot Threads

Recent Insights

Back
Top