Just as an experiment, I decided to put together the following "circuit":
I then went ahead and measured Vbe, Vbc and Vec and this yielded the following results:
- Vbe = 0.602 V
- Vbc = 0.589 V
- Vec = 0.013 V
Here is the question: As you can see from the circuit above, the Collector is not connected to anything so shouldn't Vbc be an absolute zero? Why am I measuring 0.589 V?
EDIT: I wanted to be more specific regarding what is really confusing me, I am not sure if this will make a difference or not but here it goes:
First let’s take the circuit mentioned above and replace the transistor with the diode equivalent analogy. I realize that replacing a transistor with two diodes is not truly equivalent but I just want to make a point.
Looking at the circuit above, it is clear that the diode representing the collector pin is doing absolutely nothing. As a matter of fact, it should be perfectly fine to just remove that diode and the circuit should behave exactly the same right?
What this reveals is that the collector plays no part whatsoever in this circuit (it should be like it is not there at all) and yet, somehow, I am getting a Vbc voltage. Is that crazy or what?
Of course, the fact is that the collector IS playing a role here, this is the only logical explanation for the reason there is a voltage across Vbc. But why is this happening? Is the diode analogy of a transistor not accurate?