Magnetic Fields from Currents
Online lecture videos recorded by Prof. Darin Acosta
Use of these videos for teaching purposes requires the explicit
consent of Prof. Dain Acosta
- Magnetic Field of a Moving Charge
- Magnetic Field from a Current: the Biot-Savart Law
- Lecture covering both (14:45)
- Introduction to the magnetic field from a moving electric charge, and the Biot-Savart law for the magnetic field from an electric current
- Examples of Calculating the Magnetic Field
- Magnetic Force Between Two Parallel Wires Carrying Current
- Lecture (12:17)
- Demonstration and calculation of the magnetic force between two parallel wires carrying a current
- Magnetic Field From a Current Loop
- Lecture (28:26)
- Calculation of the magnetic field from a circular current loop along the axis of the loop, and the correspondence to a magnetic dipole such as a bar magnet
- Force on a Magnetic Dipole in a Non-uniform Field (13:23)
- Discussion of the force on a magnetic dipole, or current loop, in the presence of an external magnetic field that is not spatially uniform. Or in other words, why do magnets stick?!
- Ampere's Law
- Lecture (15:28)
- Discussion of Ampere's Law and application to calculating the magnetic field outside of a long straight wire
- Applications of Ampere's Law
Copyright Darin Acosta, 2021