Skip to main content

# Electrodynamics videos

Here you will find 5 free electrodynamics videos. These are suitable for use in school and university.

Video
Level 2 (suitable for students)

## Ohm's law explained simply in 13 minutes!

Here you will learn how to recognize Ohm's Law in a U-I diagram and how to apply the associated URI formula. Three examples are covered.

Content of the video
1. [00:00] Hello there!
2. [00:44] The 1st ingredient: Voltage
3. [01:30] The 2nd ingredient: Electrical conductor
4. [01:57] The 3rd ingredient: Electric current
5. [03:28] Data points and Ohm's law as a graph
6. [05:58] Ohmic conductors
7. [06:44] Slope of the graph
8. [07:52] Ohm's law as a formula
9. [10:10] Electrical resistance
10. [10:16] Example #1: Resistance unknown
11. [10:42] Example #2: Voltage unknown
12. [11:10] Example #3: Current unknown
Video
Level 1 (suitable for all)

## Voltage explained simply in 10 minutes!

Here you will learn what voltage is, how it is generated by charge separation, how a voltage source can be created, and what voltage has to do with current.

Content of the video
1. [00:00​] Hello there!
2. [00:48​] Positive and negative electric charge
3. [02:00​] Charge separation generates voltage
4. [03:46​] Voltage is energy per charge
5. [06:21​] Voltage source and electric current
6. [08:57] Is voltage dangerous?
Video
Level 1 (suitable for all)

## Electric Current explained simply in 7 minutes!

In this video you will learn the basics of the electric current, i.e. the definition, its physical meaning and unit.⠀

Content of the video
1. ⏲ [00:25] Electric charges
2. ⏲ [02:11] What causes the electric current?
3. ⏲ [03:42] Formula + unit of electric current
4. ⏲ [05:43] Is one ampere a large current?
5. ⏲ [06:44] Summary
Video
Level 2 (suitable for students)

## Plate Capacitor explained simply in 7 minutes!

Here the plate capacitor is simply explained. With the help of the capacitor you will learn about the electric voltage, electric field and electric capacitance and how to calculate them for a plate capacitor.

Content of the video
1. ⏲ [00:11] Setup and Applications of a plate capacitor
2. ⏲ [01:58] Voltage
3. ⏲ [03:38] Capacitance
4. ⏲ [04:57] Force on a test charge & Electric field
Video
Level 3 (for advanced students)

## Maxwells Equations explained extensively in 40 minutes!

The Maxwell’s equations are studied in the second semester of physics. Here you will learn EVERYTHING about them just within 40 minutes - explained for BEGINNERS!

Content of the video
1. ⏲ [00:14] Applications of the Maxwell equations
2. ⏲ [02:08] Electric field vector
3. ⏲ [05:12] Magnetic field vector
4. ⏲ [10:15] Divergence integral theorem - this mathematical theorem combines the volume integral of the divergence of a vector field with the surface integral of this vector field.
5. ⏲ [10:15] Divergence integral theorem - this mathematical theorem combines the volume integral of the divergence of a vector field with the surface integral of this vector field.
6. ⏲ [17:50] Curl integral theorem - this mathematical theorem combines the surface integral of the curl of a vector field with the line integral of this vector field.
7. ⏲ [23:58] The FIRST Maxwell’s equation - states that the charges are sources and sinks of the electric field.
8. ⏲ [27:46] The SECOND Maxwell’s equation - states that magnetic charges always occur as dipoles. There are no magnetic monopoles.
9. ⏲ [30:23] The THIRD Maxwell’ equation (Faraday’s law of induction) - states that a time-varying magnetic field generates an electric field and vice versa. This Maxwell equation contain also the Lenz’s rule.
10. ⏲ [35:02] THE FOURTH Maxwell’s equation - states that the magnetic field can be generated by electric currents and time-varying electric fields (displacement current)