Solution to Frame 73
When voltage decreases, then current
Solution to Frame 74
In most cars, you can make the dashboard light
dimmer or brighter by turning a knob back and
forth. What you are really turning is a variable
resistor: The symbol for a variable resistor is
Label the variable resistor in the circuit below.
Solution to Frame 75
A variable resistor is a device that opposes the flow
of current. As its name implies, the amount of
resistance that a variable resistor offers to current
can be ____________________.