A Demonstration of Lenz’s Law (1835) Prepared by Mark Spencer WA8SME

Lenz’s Law (1835) Anytime and electron moves…it creates a magnetic field Anytime a magnetic field moves or changes…it caused electrons to move

Plastic/Copper/Aluminum Plastic – Fast Copper – Slowest Al - Medium Insulator – no moving electrons therefore no magnetic field created Conductor – opposing magnetic field created from moving electrons Cu is better conductor than Al – more moving electrons, stronger magnetic field

Falling Magnet and Radio Waves Transmitter – Moves electrons in the antenna in step with intelligence to be sent – Moving electrons create magnetic field – Changing magnetic field creates electrostatic field (moving electrons) – Repeats and spreads out at about the speed of light Alternating magnetic- electrostatic fields (electro- magnetic radiation) Receiver – The final magnetic field washes across the receiving antenna – Causes electrons to move in the antenna and down the coax to the receiver – Receiver extracts the intelligence THE MAGIC OF RADIO