Contents

Electromagnetic Induction and Inductors

• E.m.f. induced in a coil and the Lenz's Law
• Self-inductance
• Mutual inductance
• Energy stored in an inductor
• Different types of inductors

Transformers

• Turn ratio, voltage ratio and current ratio
• Autotransformers

Electromagnetic Devices

• Relays
• Loudspeakers
• Microphones

Advanced Topics : Electromagnetism (OPTIONAL)

• Magnetic field and magnetic field lines
• Force on a current carrying conductor
• Magnetic flux
• Faraday's law of electromagnetic induction
• Magnetomotive force and magnetic field strength
• Permeability

Front Page

Summary

Quiz