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That is like what my very first transistor learning lesson said when I was 12.
Transistor = transference resistor.
In spite of the name the BJT transistor is basically a current-controlled current-source, not a current-controlled resistance.I mean current controlled variable resistor.
Use a potentiometer connected as a rheostat. But this will be manually controlled, not electronically.Is there a way you can get a variable resistor with just passive components?
A bit unobjective your answer is. Specially in view of the facts.Seems you and the Op both need a visit to get some help.
That's all such a load of muddled misinformation, I can't really make enough sense of it for a decent reply.If I put a power supply behind a resistor, and I switch the power supply on, the extra voltage supplied will cancel the resistance.
So this is a current controlled variable resistor as well.
When the power supply is off, the resistor counts, when the power supply is on, it will include extra voltage into the system which cancels off the resistor and makes it the same amps.
The power thats already in the system is supposed to connect to this supply in series, and become one single chain, 2 supplies acting as a single supply together.
What nonsense is this? A voltage doesn't "cancel" a resistance.If I put a power supply behind a resistor, and I switch the power supply on, the extra voltage supplied will cancel the resistance.
Not at all. The resistor's value as given by R = V / I stays the same wherever you put voltage sources in your circuit. It does not change.So this is a current controlled variable resistor as well.
Doesn't sund like you've got your basic electronics skills right.When the power supply is off, the resistor counts, when the power supply is on, it will include extra voltage into the system which cancels off the resistor and makes it the same amps.
Without a scheatic diagram of the circuit that you seem to have in mind we cannot understand what you mean. There#s more than one way to connect two power supplies.The power thats already in the system is supposed to connect to this supply in series, and become one single chain, 2 supplies acting as a single supply together.
Of course, because you also doubled the voltage.i went through twice the resistance but the amps were the same.
Not at all, it is still there and it is effective.so if I go through a second power supply in series, the resistance gets cancelled out.
The second power supply position will act like a short, and the other wires wont get any current. even if they have 0 resistance! so on the wire the supply is on it is acting like a negative resistor.Of course, because you also doubled the voltage.
Not at all, it is still there and it is effective.
No wire can act as a negative resistor. The best one can achieve with high effort is near 0 Ω resistance with supeconducting wires.the wire the supply is on it is acting like a negative resistor
... and you need to follow conventions more.You need to open your mind a little bit!
No matter how wide open your mind is, you can't alter the experimentally-verifiable physical facts of electronics.You need to open your mind a little bit!
I only care about what works too. If its not in the practical electrical model i'm not interested in it either.No matter how wide open your mind is, you can't alter the experimentally-verifiable physical facts of electronics.