*Question G6A06:
Why should wire-wound resistors not be used in RF circuits?*  

*Correct Answer is  B: The resistor’s inductance could make circuit performance unpredictable*  

### AI Response: (may contain errors)  

Wire-wound resistors are not suitable for RF (radio frequency) circuits primarily because of their inductive properties. Here's why:

1. **Correct Answer: B - The resistor’s inductance could make circuit performance unpredictable**
   - Wire-wound resistors are constructed by winding a wire around a core. This construction inherently introduces inductance.
   - At RF frequencies, even small amounts of inductance can significantly affect circuit performance, leading to unpredictable behavior such as unwanted resonances or impedance changes.

2. **Why the other choices are incorrect:**
   - **A: The resistor’s tolerance value would not be adequate**
     - Tolerance refers to how much the resistance can vary from its stated value. While tolerance is important, it is not the primary issue with wire-wound resistors in RF applications. The inductance is the main concern.
   - **C: The resistor could overheat**
     - Overheating is generally related to power handling, not the type of resistor. Wire-wound resistors can handle high power levels, so overheating is not a specific issue in RF circuits.
   - **D: The resistor’s internal capacitance would detune the circuit**
     - While all components have some parasitic capacitance, the inductance of wire-wound resistors is a much more significant factor at RF frequencies. The inductance is what primarily affects the circuit's performance.

3. **Useful Rule of Thumb:**
   - In RF circuits, always consider the parasitic inductance and capacitance of components. For resistors, prefer non-inductive types like carbon composition or metal film for RF applications to minimize these effects.