Saturday, 17 December 2016

diodes - Red LED light up at 1.7V with resistor?



Voltage drop for red LED is around 1.7V, but in my experiment, which consist of a voltage supply connected to a 330ohm resistor and a red LED all in series, the min voltage supply needed for LED to light up is 1.7V? by using Ohm's law the current is 0 ? but the LED light up ?


(I'm supposed to find the min voltage (and current) needed to light up the LED)




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