3.9 Potential Dividers Flashcards
1
Q
What is a potential divider?
A
A component that splits potential difference
2
Q
What is the equation for finding out the voltage of one resistor in a potential divider?
A
R1/total circuit resistance x supply voltage
3
Q
What is a potentiometer?
A
A series circuit with a cell, and a single variable resistor taking the place of two fixed resistors (like in potential dividers). The variable resistor allows the ratio of the resistances R1 and R2 to be adjusted by moving a slider.
4
Q
What is the equation for finding out the voltage across one side of the variable resistor in a potentiometer?
A
R1/total circuit resistance x supply voltage
5
Q
What are two common applications of potentiometers?
A
- Adjusting screen brightness on a smartphone
- Controlling the speed of a motor
