First post for me... I'm reading Tony's DC volume and going along in the worksheets. I feel sheepish asking this, but I'm confused about the results of "Question 18" in the HTML version of the current Voltage Dividers worksheet. (http://www.allaboutcircuits.com/worksheets/e_divide.html)
To whit, the circuit diagram is:
The symbology, to me, implies that we measure the voltage from V.out to a common ground, but when I look at that, the voltage from (lower-left-most) ground to V.out is going to be zero.
Yet, the answer says -12.5v. Therefore, I believe I'm misunderstanding this circuit. Searching for the symbology of the triangles used as ground in this circuit shows "signal ground", which I don't really understand.
What am I missing here?
To whit, the circuit diagram is:
The symbology, to me, implies that we measure the voltage from V.out to a common ground, but when I look at that, the voltage from (lower-left-most) ground to V.out is going to be zero.
Yet, the answer says -12.5v. Therefore, I believe I'm misunderstanding this circuit. Searching for the symbology of the triangles used as ground in this circuit shows "signal ground", which I don't really understand.
What am I missing here?