PHYS 11 Lecture Notes - Lecture 11: South Magnetic Pole, Magnet, Electromagnetic Induction
Document Summary
Earth"s magnetic south pole is in canada. A magnet free to rotate will line up parallel to the earth"s magnetic field. It ends points to the earth"s magnetic poles. Abstract idea, exerts a force on moving charge, including magnets. Begins at n and end at s. Field declines as 1/distance a steeper decline than the 1/distance for electric or gravitational forces because forces from both poles cancel at large. By arranging wire into a loop, can make magnetic fies add to an intense field. Number of wraps = the strength of the magnetic field. Placing an iron core inside electromagnet increases the magnetic field strength. Faraday"s law of electromagnetic induction and induced current. A changing magnetic field produces an electric field. Wire wrapped, one end at meter, if magnet moved in field there is current, when not moved, no currents. Make electricity by moving magnets up and down. Make electricity go from one place to another using electric field.
