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: Electric Motors (Part 2)
A video exploring electric motors. This video is part 2 in a 3 part video series. This video shows that a commutator can be used in order to keep the loop of wire rotating in the magnetic field. [10:36]
Khan Academy
Khan Academy: Faraday's Law Introduction
How a current can be induced in a loop of wire by a change in magnetic flux? This video introduces students to Faraday's Law. [5:37]
Khan Academy
Khan Academy: The Dynamic Sun
A video exploring the magnetic field on the Sun and how it effects solar activity. [3:18]
Khan Academy
Khan Academy: Earth's Magnetic Shield
Did you know that if Earth's strong magnetic field didn't exist, life might not be possible? This video will explore how magnets do more than pick up metals objects. [2:02]
Khan Academy
Khan Academy: Are 2 Magnets Stronger Than 1?
A video showing a resource that helps answer the question will the power of two magnets stuck together increase the overall force and why. [0:36]
Khan Academy
Khan Academy: Magnetic Field Created by a Current Carrying Wire
Watch how a wire carrying a current creates a magnetic field. [9:42]
Khan Academy
Khan Academy: Magnetic Force Between Two Currents Going in the Same Direction
Sal Khan shows how to determine the magnetic force between two currents going in the same direction. [10:59]
Science Friday Initiative
Science Friday: The Poles, They Are a Changin'
A Florida airport recently had to close its main runway to repaint directional signs, due to the changing location of magnetic north. We'll talk about the planet's magnetic field.
Khan Academy
Khan Academy: New Topic: Earth's Magnetic Field (How to Measure)
A demonstration of an experiment that asks the question, how can we describe the strength of the Earth's magnetic field using a magnet and a compass? What does this tell us? [1:17]
Khan Academy
Khan Academy: Inverse Cube Law (Method of Oscillation)
In this video, we compare the speed of compass oscillation vs. distance from a magnet. What kind of relationship do we observe. Is it linear? [2:08]
Khan Academy
Khan Academy: Inverse Cube Law (Deflection Method)
Watch an attempt to measure the change in the force of a magnet over a distance using the deflection of a compass. What is wrong with this approach? [1:47]
Khan Academy
Khan Academy: Earth's Magnetic Field (How to Measure)
How can we describe the strength of the Earth's magnetic field using a magnet and a compass? What does this tell us? Watch this demonstration to find out. [1:16]