Hi guys. Can anyone explain to me how the voltage between Tp1 and Tp2 decrease ? Thank you !
(This is Question 29 in KVL Worksheet of allaboutcircuits)

 

You are probably overthinking the problem, it is very simple.

What cause the voltage at one end of a wire to be different from the other end?

 

You are probably overthinking the problem, it is very simple.

What cause the voltage at one end of a wire to be different from the other end?

Is the resistance of the wires?

 

Is the resistance of the wires?

Yep!

 

Yep!

Thank you so much!

 

Is the resistance of the wires?

Yes, and another factor as well. Assuming the resistance of the wire did not change, what would cause the voltage change?

 

Yes, and another factor as well. Assuming the resistance of the wire did not change, what would cause the voltage change?

Hmmm I don't know, sir. Could you tell me about it?

 

Is there a voltage drop in the wires if there is no current flowing?

 

Is there a voltage drop in the wires if there is no current flowing?

No, no voltage drop if no current flowing

 

So what is the second factor that effects the voltage change across the wires?