*Question G9B10:
What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?*  

*Correct Answer is  D: 33 feet*  

### AI Response: (may contain errors)  

To determine the approximate length of a 1/2 wave dipole antenna for a specific frequency, you can use the formula:

$$
L = \frac{468}{f}
$$

where:
- $L$ is the length of the dipole in feet.
- $f$ is the frequency in megahertz (MHz).

For a frequency of 14.250 MHz, the calculation is:

$$
L = \frac{468}{14.250} \approx 32.84 \text{ feet}
$$

This rounds to approximately 33 feet, which is the correct answer.

### Explanation of Choices:
- **A: 8 feet**  
  This length is too short for a 1/2 wave dipole at 14.250 MHz. It might be closer to a 1/2 wave dipole for a much higher frequency.
  
- **B: 16 feet**  
  This length is also too short. It would be suitable for a frequency around 29 MHz, which is in the 10-meter band.
  
- **C: 24 feet**  
  This length is still too short for 14.250 MHz. It might be appropriate for a frequency around 19.5 MHz.
  
- **D: 33 feet**  
  This is the correct length for a 1/2 wave dipole at 14.250 MHz, as calculated above.

### Key Points:
- The formula $\frac{468}{f}$ is a rule of thumb for calculating the length of a 1/2 wave dipole in feet.
- Always ensure the frequency is in MHz when using this formula.
- The correct length for 14.250 MHz is approximately 33 feet, making option D the correct choice.