# Course Electricity and magnetism

Electromagnetic phenomena and their applications Level 2 (suitable for students)
Level 2 requires school mathematics. Suitable for pupils.
1. 1
Lesson

## Electric current: How charges flow through a conductor

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

Content of the lesson
Video

## 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
Related formulas
Formula

2. 2
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.

Content of the lesson
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?
3. 3
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.

Content of the lesson
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
Related formulas
Formula

4. 4
Lesson

## Plate Capacitor: Voltage, Capacitance and Eletric Force

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 lesson
Video

## 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
Quests with solutions
Exercise with solution
Level 2 (suitable for students)

## Create a plate capacitor with a certain capacitance

In this exercise (with solution) you have to calculate the distance between the capacitor plates for a given capacitance and and than use relative permittivity.

Exercise with solution
Level 2 (suitable for students)

## Charge in a thundercloud

The exercise teaches you how to calculate the charge of a thundercloud using the capacitance and E-field in the plate capacitor.

Exercise with solution

## Capacitor with and without dielectric in comparison

In this exercise with solution about the plate capacitor, the capacitance, voltage and energy must be compared with and without dielectric.

Related formulas
Formula

Formula

Formula

Formula