Electrodynamics

Video

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
Lesson

Ohm's law: Formula, Graph and 3 Easy Examples

Here you learn Ohm's law, how it is expressed as a formula and as a graph. We also look at three examples.

Course

Electricity and magnetism

Here you will learn the basics of electromagnetism. Interaction between electric charges and the effect of the magnetic field.

    Video

    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?
    Lesson

    Voltage: How it is created by charge separation!

    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.