Please help me, What do ohms do to volts?

arunb said:

Do you expect a kid to understand thevenin's theorem and Kirchoff's law ???

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Kirchoff's Law, certainly.

If he can't, we might as well quit commenting on this thread because that is exactly what we are trying to explain. What we call it is irrelevant. It might as well be called Bugs Bunny's Law.

And I would certainly expect him to understand Kirchoff's Law and how it applies to a very simple, two or three resistor series circuit before I would a circuit combining components that behave in mathematically different ways.

So my question to you is, do you really expect a child to understand the behavior of PN a junction in a light emitting diode and how it behaves in a series circuit BEFORE he understands how two resistors behave in a series circuit?

sram said:

This is how it works. You should understand it first with resistors, then go to the more complicated stuff.

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Thank you.

JunaidKhan said:

Here is an easy example. If I have 9 volts and connect 3300k R to an LED, I see that the voltage dropped. But what I don't understand is what does the resistor mean by 3300k? Does it mean that that’s how many electrons it will let through regardless of volts?

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To further emphasize my point, I would say that is actually NOT an easy example. You should start by understanding circuits with only resisters first. The LED is basically a diode:

Diode - Wikipedia, the free encyclopedia

And it can get a bit confusing with a diode. I wouldn't explain ohm's law to a starter with a diode involved !

Wow, this thread deteriorated rapidly. Why can't we keep to simple ohms law and get him understanding that before going on to more complex stuff.

Looks to me like everyone wants to boast how much they know rather than help the original poster.

Just stick to ohms law and let the guy learn.

Mike.

Pommie said:

Wow, this thread deteriorated rapidly. Why can't we keep to simple ohms law and get him understanding that before going on to more complex stuff.

Looks to me like everyone wants to boast how much they know rather than help the original poster.

Just stick to ohms law and let the guy learn.

Mike.

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I totally agree, keep it simple.
Ohm's Law is simple.
Actually, Kirchoff's law is even more simple, i.e. it is simple addition, kindergarten stuff (1+1=2)

Stick to those two principals first. Glad we agree on something.

Edit: I apologize, I do not mean to come across as combative. I just VERY STRONGLY feel that learning electronics is a building block process and should be approached as such to avoid confusion....especially with a child.