19.1 Introduction to Magnetic Fields and Forces
Introduction to Magnetic Fields and Forces
| MAGNETIC FIELDS AND FORCES | |
|---|---|
| • Magnetic field lines go from north pole to south pole outside the magnet (but south pole to north pole through the magnet).• The magnetic north pole of a compass needle faces toward Earth’s geographic north pole.• Earth’s geographic north pole is a magneticsouth pole. |  |
| Magnetic Force on a Charged Particle in Motion | |
| F = qvBsinθ q = charge v = velocity B = magnetic field θ = angle between v and B |  |
| Magnetic Field | |
| B = F / qvBsinθ SI Unit = Tesla (T) 1T = 104G (Guass) | |