# The Voltage Divider

23 The circuit shown in Figure 1.7 is called a *voltage divider*. It is the basis for many important theoretical and practical ideas you encounter throughout the entire field of electronics.

The object of this circuit is to create an output voltage (V_{0}) that you can control based upon the two resistors and the input voltage. V_{0} is also the *voltage drop* across R_{2}.

What is the formula for V_{0}? _____

R_{1} + R_{2} = R_{T}, the total resistance of the circuit.

24 A simple example can demonstrate the use of this formula.

For the circuit shown in Figure 1.8, what is V_{0}? _____

25 Now, try these problems.

What is the output voltage for each combination of supply voltage and resistance?

_{S}= 1 volt, R

_{1}= 1 ohm, R

_{2}= 1 ohm

V_{0} = _____

_{S}= 6 volts, R

_{1}= 4 ohms, R

_{2}= 2 ohms

V_{0} = _____

_{S}= 10 volts, R

_{1}= 3.3. kΩ, R

_{2}= 5.6 kΩ

V_{0} = _____

_{S}= 28 volts, R

_{1}= 22 kΩ, R

_{2}= 6.2 kΩ

V_{0} = _____

26 The output voltage ...

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