Khan Academy

Battery meter (galvanometer) (K-A)

Electrolyte (strong acid test) (K-A)

Discovery of electromagnetism-video (K-A)

Electrolyte (temperature test) (K-A)

Electromagnetic field (above vs. below) (K-A)

Electrolyte test (pure water vs. vinegar) (K-A)

Electromagnetic field (forward vs. reverse) (K-A)

How Many Turns? (K-A)

Electromagnetic field (loop) (K-A)

How much electrolyte does a single cell need? (K-A)

Experiment: What's the shape of a magnetic field? (K-A)

How to measure? (K-A)

Right-hand rule (K-A)

Reverse electrodes (polarity) (K-A)

Standard cell (K-A)

Listen to variable resistance (K-A)

The battery and electromagnetism (K-A)

Pencil resistor (K-A)

Zinc copper cell (reduction-oxidation) (K-A)

Series load (K-A)

Variable resistor (pencil) (K-A)

Build your own motor (K-A)

Spinning compass (K-A)

What's next (K-A)

Discovery of triboelectric effect (K-A)