Khan Academy: Electric Power

A video lecture discussing the force of the magnetic field that turns an electric motor. Video also shows how to calculate net torque on a loop of current in a wire. [10:35]

In this video, David from Khan Academy explains how to find the electric potential energy for a system of charges and solves an example problem to find the speed of moving charges. To see the calculus derivation of the formula watch this...

In this video, David from Khan Academy shows how to find the total electric potential at a point in space due to multiple charges.

Sal Khan explains electric potential energy difference in a varying field in this video.

Some basic concepts to introduce the electrical engineering course. Become familiar with engineering numbers and notation, and learn about the two most important electrical quantities: current and voltage.

The direction of an electrical field at a point is the same as the direction of the electrical force acting on a positive test charge at that point. This video demonstrates how to solve electrical field problems. [12:35]

In this video, explore how the electric field is defined. Learn how the electric field can be useful in the study of physics. [13:46]

The final video in a series of videos that finishes the explanation of how a commutator will allow a loop of wire to continue spinning in a magnetic field. Understand how this spinning magenta field allows work to be done known as an...

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]

Sal Khan shows that there will be a net torque on a loop of current in a wire in this video. He also shows that this net torque will cause the loop to rotate. [10:35]