# Resistors **If a wire is analogous to a water pipe, what does a resistor do?** If a wire is analogous to a water pipe, a resistor *makes the pipe narrower and decreases the flow of current.* > **In the case of the water pipe analogy for wires, what does the water pressure represent?** > In the case of the water pipe analogy for wires, the water pressure represents *the voltage.* > > **In the case of the water pipe analogy for wires, what does the water flow represent?** > In the case of the water pipe analogy for wires, the water flow represents *the current.* **In what three ways do carbon film resistors cause resistance?** The three ways that carbon film resistors cause resistance include: 1. The composition of the material. 2. The thickness of the material. 3. The spiral pattern. ... # Capacitors **What does a capacitor consist of in its most basic form?** In its most basic form, a capacitor consists of *a layer of insulating material with a conductive surface on each side.* ...