# Tagged Questions

Important to inductors, transformers, generators, motors, magnetic fields, inductive heating, magnetic storage, permanent magnets

44 views

### How does inductance change with presence of different directional magnetic fields?

If I design a coil driver for a certain application, I assume there is a fixed load right? It may have drive any inductance between an interval but you can not drive any coil, because the driver is ...
35 views

### Ferromagnetic core with air gap

N=200 I=N*8A l=20cm=2*10^-1 d(delta)=1mm=10^-3 M=? M=(B/μ)-H How can I get the vector of magnetization? The relative permeability is not known. Everything I ...
67 views

### electromagnet repelling permanent magnet [closed]

I have an electromagnet (turned off) with an iron core in front of a permanent magnet. At this stage they attract each other. Will any current do if I want them to repel each other, or is there a ...
7k views

### What is the difference between the magnetic H field and the B field?

Wikipedia provides a mathematical explanation. Can I get the intuitive one? I'd like to, for example, understand a ferrite datasheet. These usually have graphs of H vs B, and the definition of ...
824 views

### How internal capacitor stud finders work?

I don't understand how can a non magnetic object like wood be detected using a stud finder For instance, stud finders find wood from dielectric constance, but I don't understand the princible. The ...
152 views

### low frequency 1-10Hz transformer

I have a 20V, 2 Amp Max, 10Hz sine wave generator, I would like to be able to connect a transformer to step up and down the voltage. How would I go about finding a transformer that I could connect to ...
33 views

### In electromagnetic inductance, which one is more efficient, to focus all power to move one part or split it to move both at the same time?

Assuming equal force is used, which one would be more efficient when it comes to generating current through electromagnetic induction: to use 100% of available force to move the permanent magnet only ...
39 views

### 3-phase, 2-circuit transmission line calculations

I am trying to assess different positions for 6 conductors of a 3-phase, 2-circuit transmission line. The aim is to minimise the intensity of the magnetic field (H) at the edge of the ROW, 1m above ...
13k views

### What is the difference between a transformer and a coupled inductor?

Transformers and coupled inductors seem very similar. Is there a difference in construction? Or only in use? This question asks something similar, but the answers don't address my question: Coupled ...