Electronics - Diodes and Applications - Discussion
Discussion Forum : Diodes and Applications - General Questions (Q.No. 9)
9.
What is the current through the LED?
Discussion:
35 comments Page 3 of 4.
Devidas K said:
1 decade ago
No. Led having its own resistance that is self resistance so some voltage must be drop across it.
Answer is correct.
Answer is correct.
Sandeep said:
1 decade ago
1.5 is substaract for Red Led only? if there is Yellow Led then will we subtract 2 ?
Uma said:
1 decade ago
Someone said that LED has resistance so there is voltage drop ! I want to know, what is resistance of LED ? And how can we measure that?
Ganesh.K said:
1 decade ago
I = V/R
R = 330 , V = 6 - 1.5V (LED drop voltage) So V = 4.5V
I = 4.5/330
I = 0.013 A or 13 mA
R = 330 , V = 6 - 1.5V (LED drop voltage) So V = 4.5V
I = 4.5/330
I = 0.013 A or 13 mA
Nithesh said:
1 decade ago
Why 6 - 1. 5 ?
Srivalli said:
1 decade ago
Typically, a LED forward voltage is about 1.8–3.3 volts; it varies by the color of the LED. A red LED typically drops 1.8 volts, but voltage drop normally rises as the light frequency increases, so a blue LED may drop around 3.3 volts.
Renu said:
1 decade ago
Is every led has same voltage drop i.e. 1. 5?
Anbu said:
1 decade ago
I think the Led drop volatage will vary according to the various leds like red, blue, so normally we can judge 1.5v na?
Sapana said:
1 decade ago
Is all type of LED has the same voltage drop?
Amit said:
1 decade ago
To akansha LED is always operated in forwar bais. Not reverse.
Anoth note to all friends.
If question said IDEAL DIOD then voltage drop is 0.
Anoth note to all friends.
If question said IDEAL DIOD then voltage drop is 0.
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