1. Physics 121: Electricity & Magnetism – Lecture 9 Carsten Denker NJIT Physics Department Center for Solar–Terrestrial Research

2. March 21, 2007Center for Solar-Terrestrial Research Magnetic Fields The force acting on a charged particle moving with velocity through a magnetic field is always perpendicular to and. Opposite magnetic poles attract each other, and like magnetic poles repel each other.

3. March 21, 2007Center for Solar-Terrestrial Research Crossed Fields Discovery of the electron: cathode ray tube Hall effect Both an electric field and a magnetic field can produce a force on a charged particle.

4. March 21, 2007Center for Solar-Terrestrial Research A Circulating Charged Particle

5. March 21, 2007Center for Solar-Terrestrial Research Magnetic Force on a Current–Carrying Wire

6. March 21, 2007Center for Solar-Terrestrial Research Torque on a Current Loop