Free ebook on electromagnetism: learn fields, circuits, induction, Maxwell’s equations, motors, wireless power, MRI, and more.
Free ebook + audiobook content
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Electric Charges and Coulomb's Law
+ Exercise: What determines the direction of force between two electric charges according to Coulomb's Law? 3 minutes
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Electric Fields and Potential
+ Exercise: What is the mathematical expression for the electric field due to a point charge? 4 minutes
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Electric Current and Circuits
+ Exercise: What is the conventional direction of electric current flow in a conductor? 4 minutes
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Gauss's Law and Its Applications
+ Exercise: What is the electric field outside a conducting sphere with charge Q according to Gauss's Law? 3 minutes
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Ohm's Law and Electrical Circuits
+ Exercise: What is the mathematical expression of Ohm's Law? 4 minutes
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Magnetic Fields and Forces
+ Exercise: What primarily generates magnetic fields? 4 minutes
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Faraday's Law of Induction
+ Exercise: What is the correct mathematical expression of Faraday's Law of Induction? 4 minutes
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Ampère's Law and Magnetic Fields
+ Exercise: What does Ampère's Law describe in electromagnetism? 4 minutes
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Maxwell's Equations and Electromagnetic Waves
+ Exercise: What does Gauss's Law for Magnetism state? 3 minutes
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Quantum Electrodynamics (Brief Overview)
+ Exercise: What central concept in Quantum Electrodynamics involves discrete packets of energy? 3 minutes
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Working Principles of Electric Motors
+ Exercise: Which component of an electric motor ensures continuous rotation? 3 minutes
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Transformers and Power Distribution
+ Exercise: What is a key function of transformers in power distribution systems? 4 minutes
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Wireless Communication and Antennas
+ Exercise: What is the primary function of antennas in wireless communication systems? 4 minutes
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Magnetic Storage Devices
+ Exercise: Which type of magnetic storage device is primarily used for archival and backup purposes? 4 minutes
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Magnetic Resonance Imaging (MRI)
+ Exercise: What is a key principle of MRI technology? 5 minutes
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Electromagnetic Propulsion Systems
+ Exercise: What is a key advantage of magnetic levitation (maglev) trains in modern transportation? 3 minutes
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Wireless Energy Transfer
+ Exercise: What principle is primarily used in wireless charging systems today? 5 minutes
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Maglev and Transportation
+ Exercise: Which of the following is NOT an advantage of maglev technology? 4 minutes
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Developments in Electromagnetic Shielding Technologies
+ Exercise: What is a key benefit of conductive polymers in electromagnetic shielding? 4 minutes
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Building Simple Circuits
+ Exercise: Which component allows current to flow in only one direction? 4 minutes
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Measuring Magnetic Fields
+ Exercise: What is the unit of magnetic field measurement that equals 10,000 Gauss? 5 minutes
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Observing Electromagnetic Induction
+ Exercise: What principle is demonstrated in the experiment with a coil of wire and a magnet? 3 minutes
About the free ebook with audio
Electromagnetism Unveiled: From Basics to Modern Technologies
This free ebook introduces the principles that connect electric charge, magnetism, motion, energy, and communication. It builds a clear foundation in Coulomb’s law, electric fields, potential, current, circuits, and magnetic forces before showing how these ideas shape modern technology.
Build a connected understanding of electromagnetic phenomena
Explore how charges interact, how fields describe forces at a distance, and how voltage and current behave in practical circuits. The ebook explains major laws including Gauss’s law, Ohm’s law, Faraday’s law, and Ampère’s law, helping readers relate equations and physical intuition.
You will also examine Maxwell’s equations as a unified description of electricity, magnetism, and electromagnetic waves. These concepts provide the basis for technologies that transfer energy, send signals, produce motion, and store information.
See physics at work in everyday and advanced systems
- Electric motors, transformers, and power distribution
- Antennas, wireless communication, and wireless energy transfer
- Magnetic storage, MRI, maglev transport, and electromagnetic propulsion
- Electromagnetic shielding and a brief introduction to quantum electrodynamics
Learn through observation and simple applications
Practical pages on building simple circuits, measuring magnetic fields, and observing induction connect theory to hands-on investigation. By the end, readers can recognize how changing electric and magnetic fields enable many devices used in homes, laboratories, medicine, transportation, and communications.
This resource is designed for school physics study and for anyone seeking a structured introduction to the ideas behind modern electromagnetic technologies.
What is the difference between an electric field and electric potential?
An electric field gives the force per unit charge, while electric potential describes energy per unit charge at a location.
How does Faraday’s law explain electromagnetic induction?
It states that a changing magnetic flux through a circuit induces an electromotive force, which can produce current.
How do transformers transfer electrical energy?
They use changing magnetic fields between coils to increase or decrease AC voltage while transferring energy.
This ebook/audiobook includes:
1 hours and 34 minutes of audio content
Digital certificate of course completion (Free)
Exercises to train your knowledge
100% free, from content to certificate
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