*Question E7B10:
In Figure E7-1, what is the purpose of R1 and R2?*  

*Correct Answer is  B: Voltage divider bias*  

### AI Response: (may contain errors)  

In Figure E7-1, the purpose of R1 and R2 is to provide a **voltage divider bias** for a transistor circuit.

### Explanation:

1. **Correct Answer: Voltage Divider Bias (B)**
   - **Voltage Divider Bias** is a common method used to set the operating point of a transistor. It involves using two resistors (R1 and R2) to create a stable voltage at the base of the transistor. This helps ensure that the transistor operates in the desired region (e.g., active region) regardless of variations in transistor parameters or power supply voltage.
   - The voltage at the base ($V_B$) is determined by the voltage divider formula:
     $$ V_B = V_{CC} \times \frac{R2}{R1 + R2} $$
   - This setup provides a stable biasing condition, which is crucial for consistent transistor operation.

2. **Why the Other Choices are Incorrect:**
   - **Load Resistors (A):** Load resistors are used to limit current or drop voltage in a circuit, typically connected in series with the load. R1 and R2 are not serving this purpose in the context of biasing a transistor.
   - **Self Bias (C):** Self biasing typically involves using a single resistor connected to the emitter of a transistor to establish biasing. It does not use a voltage divider network like R1 and R2.
   - **Feedback (D):** Feedback involves routing a portion of the output signal back to the input to control the gain or stability of a circuit. R1 and R2 are not configured to provide feedback in this scenario.

By understanding the role of R1 and R2 as a voltage divider, you can see how they help maintain a stable operating point for the transistor, which is essential for reliable circuit performance.