Core Technical Unit

Solve Problems.

Magnetic and electromagnetic devices study guide and technical repository.

Quick Reference Vault

Flux Density

B = Φ / A

MMF

Fm = NI

Field Strength

H = Fm / l

Reluctance

S = Fm / Φ

Learning Content.

7 Topics
01

Magnetism

Permanent magnets, flux lines, and molecular theory. Understanding magnetic poles and field interaction.

02

Electromagnetism

Fields around current-carrying conductors and coils. Utilizing the Right Hand Grip Rule for polarity.

03

Magnetic Circuits

Reluctance, permeability, and B-H loops. Analyzing the 'Ohm's Law' equivalent for magnetic paths.

04

Electromagnetic Induction

Faraday’s and Lenz’s laws. Determining induced EMF magnitude and current direction in conductors.

05

Inductance

Self and Mutual inductance principles. Energy storage and the effects of back-EMF in inductive loads.

06

Measurement Instruments

Operating principles of analog and digital magnetic instruments, including Hall Effect sensors.

07

Magnetic Devices

Practical application and fault-finding in industrial devices: Relays, Contactors, Solenoids, and Basic Transformers. Understanding coil ratings and contact configurations.

Relays Contactors Solenoids