# Electrodynamics

Learn about the electromagnetic properties of our universe, for example about electric charges, currents, electromagnetic fields and so on.
Lesson
Level 3 (with higher mathematics)

## Hall Effect: A Simple Explanation of How Hall Voltage is Induced

Explanation of what the Hall effect is, how exactly the Hall voltage is generated and how you can calculate it and the Hall constant.

Formula

## Hall Effect (Hall Voltage, Charge Carrier Density)

Video
Level 2 (without higher mathematics)

## Hall Effect and a SIMPLE Derivation of The Hall Voltage

Learn what the Hall effect is, how the Hall voltage is generated in a current-carrying bar in a magnetic field, and how this voltage is derived.

Content of the video
1. 00:00 Hall effect: Explanation
2. 02:19 Derivation of the Hall voltage / coefficient
Formula

## Capacitance (Voltage, Charge)

Video
Level 3 (with higher mathematics)

## Inductive reactance of a coil briefly explained

Learn what inductive reactance is and how to determine it for a coil (inductor) in an AC circuit.

Content of the video
1. 00:00 What is inductive reactance?
2. 00:30 Calculate inductive reactance
3. 01:32 Example
4. 01:53 RMS current through the coil
Video
Level 2 (without higher mathematics)

## Capacitive reactance of a capacitor briefly explained

In this short video you will learn what the reactance of a capacitor is and how to calculate it.

Content of the video
1. [00:00] What is the capacitive reactance?
2. [00:38] Calculate capacitive reactance
3. [02:01] Example
4. [02:22] RMS current through the capacitor
Video
Level 2 (without higher mathematics)

## Mass Spectrometry. The Basic Principle.

In this physics video, you will learn how a mass spectrometer is constructed and how you can use it to determine the mass of charged particles.

Content of the video
1. [00:00] Introduction
2. [00:25] Velocity selector (electric & magnetic force).
3. [03:20] Derive velocity of particle
4. [04:24] Derive mass formula
5. [06:25] Specific charge, neutrons and facts
Video
Level 1 (suitable for all)

## Voltage: The Most Basic Explanation From a Physics Point of View

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 Positive and negative electric charge
2. 01:12 Charge separation generates voltage
3. 02:58 Voltage is energy per charge
4. 05:33 Voltage source and electric current
5. 08:09 Is voltage dangerous?
Derivation
Level 3 (with higher mathematics)

## Capacitance - Series and Parallel Connection of Capacitors

Derive the total capacitance (equivalent capacitance) of a parallel circuit and a series circuit of two capacitors in an AC circuit.