The voltage divider is a simple device constructed from two resistors in series. A voltage V o is applied across the combination, and the voltage at the common junction of the two resisitors is measured. By varying the values of the resistors you can obtain any voltage you desire.
Instructions Connect the resistors in series.
Apply a voltage of about 5 V to the combination and measure the voltage across R2. This graph should be a straight line showing that the voltage V is a constant fraction of the applied voltage V o . Find the slope of the line and use this value to confirm the equation above. The voltage divider as a volume control The symbol for a potentiometer. The position of the centre terminal can be varied to change R 2 .