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 TopicsMagnetism
Permanent magnets, flux lines, and molecular theory. Understanding magnetic poles and field interaction.
Electromagnetism
Fields around current-carrying conductors and coils. Utilizing the Right Hand Grip Rule for polarity.
Magnetic Circuits
Reluctance, permeability, and B-H loops. Analyzing the 'Ohm's Law' equivalent for magnetic paths.
Electromagnetic Induction
Faraday’s and Lenz’s laws. Determining induced EMF magnitude and current direction in conductors.
Inductance
Self and Mutual inductance principles. Energy storage and the effects of back-EMF in inductive loads.
Measurement Instruments
Operating principles of analog and digital magnetic instruments, including Hall Effect sensors.
Magnetic Devices
Practical application and fault-finding in industrial devices: Relays, Contactors, Solenoids, and Basic Transformers. Understanding coil ratings and contact configurations.