Class notes
Class notes circuit and network theory
- Course
- Institution
This document describes magnetic circuits and all of its relations
[Show more]
Seller
Follow
mundiaben
Content preview
EEE/ETI 1202CIRCUITS & NETWORK THEORY I
LECTURE 6
, Magnetic Circuits
• The space (or field) in which a magnetic pole
experiences a force is called a magnetic field.
Properties of magnetic lines of force.
• (i) Each magnetic line of force forms a closed loop i.e.
outside the magnet, the direction of a magnetic line of force is
from north pole to south pole and it continues through the
body of the magnet to form a closed loop.
• (ii) No two magnetic lines of force intersect each other.
• (iii) Where the magnetic lines of force are close together, the
magnetic field is strong and where they are well spaced out,
the field is weak.
• (iv) Magnetic lines of force contract longitudinally and widen
laterally.
• (v) Magnetic lines of force are always ready to pass through
magnetic materials like iron in preference to pass through
non-magnetic materials like air.
,Magnetic Flux (Φ)
• The total number of magnetic lines of force produced by a magnetic source
called magnetic flux. It is denoted by Greek letter Φ(phi)..
• Units are in Weber (Wb)
• The more the magnetic lines of force, the greater the magnetic flux and th
stronger the magnetic field.
• Magnetic Flux Density (B)
• The magnetic flux density is defined as the magnetic flux passing normally pe
unit area i.e.
, Absolute and Relative Permeability
• Permeability of a material means its conductivity for magnetic flux.
• The greater the permeability of a material, the greater is its conductivity fo
magnetic flux and vice-versa.
• The absolute (or actual) permeability *μ0 = of air or vacuum is 4π × 10−7 H/m.
• μr = 1 for air or non-ferrous materials
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mundiaben. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73314 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now