Professor Dave Explains
Gauss’s Law for the Electric Field
Maxwell's equations are the simplest way to represent the relationship between the electromagnetic field and it's carrier particle, the photon. Simple does not necessarily mean easy though. Let's dig into what Maxwell's formulas are and...
Curated Video
Solenoid Basics Explained
Solenoid basics explained. In this video we take a look at the electromagnetic field of a solenoid coil. Learning how magnets work and how they can be used to control solenoids and solenoid valves. Working principles and working animations.
Professor Dave Explains
Quantum Electrodynamics (QED)
In our study of physics, we have become aware of four forces, and the fields that mediate them. Once we got deep into quantum theory, we started to realize that these forces are not mediated by fields at all, but rather by quanta. That's...
Curated Video
How Electric Motors Work - 3 phase AC induction motors
How Electric Motor Works - 3 phase induction motor AC alternating current.
Curated Video
How does an Electric Motor work? DC Motor explained
DC Motor explained - in this video we look at how does a dc motor work to understand the basic working principle of a DC motor. We consider conventional current, electron flow, the winding, armature, rotor, shaft, stator, brushes, brush...
Science for Kids
Science Kids: How to Videos: Trigger Green Traffic Lights
Do you know the role an inductive-loop traffic detector plays in getting a green light at a traffic light? The detector senses a change in the electromagnetic field and triggers the light. This video explains how by adding a magnet to a...
Khan Academy
Khan Academy: Electromagnet: Electromagnetic Field (Above vs. Below)
Testing the direction of force when the current carrying wire is above vs. below a compass. What does this tell us? [0:27]
Crash Course
Crash Course Physics #32: Magnetism
You're probably familiar with the basics of magnets already: They have a north pole and a south pole. Two of the same pole will repel each other, while opposites attract. Only certain materials, especially those that contain iron, can be...
Khan Academy
Khan Academy: Spout Motor
This video goes inside a simple motor to see the components and learn how a motor works. [3:18]
Khan Academy
Khan Academy: Electromagnet: Electromagnetic Field (Forward vs. Reverse)
Apply current in both directions and notice that the response is different. [0:35]