Dig deeper at pwnphysics.blogspot.com

On this day in physics: 12 February 1804- Happy Birthday to Heinrich Lenz, a physicist who made contributions to the field of electrodynamics, and the namesake of Lenz's Law.

Word of the Day: Lenz's Law- I want to go back to the idea of induction. Remember 2 days ago we were talking about the change of a magnetic field aka a flux, there will be an induced current, which is a flow of electrons through the wire. But which direction does the current flow in the wire? That's where Lenz comes in?  

Lenz's Law states: "If an induced current flows, its direction is always such that it will oppose the change which produced it." So Lenz's law gives us the direction. In Faraday's law of induction, it is the minus sign in the equation, because it shows the direction of the induced current. 

Quote of the Day: "In science there is only physics, the rest is stamp collecting." -Lord Kelvin

Keywords: Faraday, Lenz, Induction, Current