DC Fundamentals Unit 7 – Series Resistive Circuits
In most electronic circuits, a reference point is used. This reference may be called a reference
point or with respect to.
In this circuit, if point A is positive with respect to point B, then point B is the circuit reference
point.
When the circuit has more than one resistor, the same principle applies. The polarity of all
voltages in a series circuit corresponds with the polarity of the current flow.
In this circuit, point A is positive with respect to point B. Point C is positive with respect to point
D. Point A is the most positive point of the circuit. Point D is the most negative point of the
circuit.
NEW TERMS AND WORDS
voltage drop - the amount of voltage across any resistor in a circuit; also called IR drop.
series string - a combination of two or more resistances in series.
EQUIPMENT REQUIRED
F.A.C.E.T. base unit
DC FUNDAMENTALS circuit board
Multimeter