Magnetic Force and Field
Online lecture videos recorded by Prof. Darin Acosta
Use of these videos for teaching purposes requires the explicit
consent of Prof. Dain Acosta
- Magnetism and the Magnetic Field
- Lecture (13:07)
- Introduction to magnetic force and magnetic field
- Magnetic Force Law
- Lecture (28:39)
- Description of the deduced magnetic force law acting on moving charged particles in magnetic fields, including the vector nature of the law and the direction of magnetic field lines
- Lorentz Force Law and Application to J.J.Thompson's Discovery of the Electron
- Qualitative Lecture (12:13)
- Description of the Lorentz Force Law and its application to the J.J.Thompson experiment that led to the discovery of the electron (part 1 - qualitative discussion)
- Quantitative Lecture (19:50)
- Description of the Lorentz Force Law and its application to the J.J.Thompson experiment that led to the discovery of the electron (part 2 - quantitative calculation)
- Hall Effect
- Lecture (14:11)
- Explanation of the Hall effect and deducing the sign of the charge carriers in a conductor
- Magnetic Force and Circular Motion
- Magnetic Force on a Current-Carrying Wire
- Lecture (9:20)
- Force on a current-carrying wire as a consequence on the magnetic force law on charged particles, with demonstration
- Torque on a Current Loop
- Lecture (20:40)
- Explanation that the torque on a current loop follows from the force on each segment of wire making up the loop. Definition of the magnetic dipole moment and a demonstration included
- DC Motors (3:30)
- Explanation and demonstration of how a DC motor works
- Magnetic Dipoles
- Lecture (14:32)
- Discussion of current loops as magnetic dipoles, and the torque acting on them and their potential energy when immersed in an external magnetic field
Copyright Darin Acosta, 2021