PHY 102 Lecture Notes - Lecture 1: Solar Wind, Magnetic Dipole
Document Summary
January 18, 2017 lecture 1 no notes. All magnets have at least one north pole and south pole. Outside the magnet field lines emerge from n and enter through s. Inside the magnet field lines move from s to n. Magnets exert forces on one another magnetic forces. Are closed-loops: there is no source of magnetic field lines (no monopoles, breaking a magnet in two creates two magnets. Magnetic field is always tangent to field lines. Near the surface of earth, there is a dipole magnetic field. Away from the earth, magnetic field is distorted by solar wind. Magnetic dipole has direction and magnitude. Magnetic force on a point charge = fb. V = velocity/speed of a charge (m/s, meters/seconds) Vsin = component of velocity perpendicular to the direction of the magnetic field: = angle between velocity and magnetic field, can draw velocity and magnetic field tail-to-tail to find the angle.
