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Nov 16, 2021 at 6:59 comment added Glenn Willen Simplifies it, certainly. But the resistor is "current limiting" in the sense that the current through it is only about linear in voltage, whereas without it, the current through the LED would be roughly exponential in voltage, which in practice means it would be huge and easily destroy the LED for most voltage ranges where anything happens at all. So with the resistor it's much more limited.
Nov 16, 2021 at 4:09 comment added Mark Ransom I know it's common to refer to resistors in this configuration as current limiting, but I think the term oversimplifies the actual mechanics. Since I = E / R, as you change the voltage the current also changes and the resistor does nothing to compensate.
Nov 15, 2021 at 13:25 comment added Russell McMahon 2:15 am . sitting in a hospital room keeping someone company. Decided to answer the question You were 2 minutes quicker :-).
Nov 15, 2021 at 13:25 vote accept Tomas Zamastil
Nov 15, 2021 at 13:12 history answered Justme CC BY-SA 4.0