Why does an LED need a RESISTOR? The Simplest Explanation.

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0:00 Relation between Voltage and Current
1:27 LED vs BULB Experiment
2:59 LED VI curve
3:36 LED vs LED Experiment
4:37 Why does an LED need a resistor in series?
5:19 Parallel vs Serial connection of LEDs
6:00 Ron Mattino. Thanks for watching! :)