Force Equations and Lorentz Law — Lesson 3

This lesson covers the concept of force equations, particularly focusing on the Lorentz force law. It explains how a current-carrying conductor placed in a magnetic field experiences a force, and how this force can be calculated using the Lorentz force law. The lesson also discusses the impact of reversing the current and the magnetic field on the direction of the force. It further elaborates on the concept of Fleming's left hand rule and right hand rule to determine the direction of the force and induced current respectively. For instance, the left hand thumb rule is used to find the force in electric motors and electromagnets, while the right hand rule is used in electric generators.

Video Highlights

00:12 - Introduction
00:28 - Explanation of how a current-carrying conductor experiences a force in a magnetic field
02:16 - Discussion on the impact of reversing the current and magnetic field on the force direction
3:32 - Explanation of the Lorentz force law equation
7:08 - Force acting on a current-carrying wire
10:59 - Application of Fleming's left hand rule and right hand rule

Key Takeaways

- A current-carrying conductor placed in a magnetic field experiences a force, which can be calculated using the Lorentz force law.
- The direction of the force can change depending on the direction of the current and the magnetic field.
- Fleming's left hand rule is used to determine the direction of the force in a current-carrying conductor, while the right hand rule is used to determine the direction of the induced current in a magnetic field.
- These principles find applications in various areas such as electric motors, electromagnets, and electric generators.