*Question G9D10:
In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?*  

*Correct Answer is  B: Broadside to the loop*  

### AI Response: (may contain errors)  

An electrically small loop antenna, which is less than 1/10 of a wavelength in circumference, has a specific radiation pattern characterized by nulls and lobes.

1. **Correct Answer: Broadside to the loop (Choice B)**
   - The radiation pattern of a small loop antenna has nulls in the direction perpendicular to the plane of the loop, which is known as "broadside." This means that if you look at the loop from the side, you will see the weakest signal or nulls in that direction.

2. **Why the other choices are incorrect:**
   - **Choice A: In the plane of the loop**  
     This is incorrect because the maximum radiation occurs in the plane of the loop. The loop radiates strongest along the plane, not nulls.
   - **Choice C: Broadside and in the plane of the loop**  
     This is incorrect because nulls only occur broadside to the loop, not in the plane of the loop.
   - **Choice D: Electrically small loops are omnidirectional**  
     This is incorrect because small loop antennas are not omnidirectional. They have a distinct pattern with nulls broadside to the loop.

3. **Useful Rule of Thumb:**
   - For small loop antennas, remember that the radiation pattern is similar to a figure-eight when viewed from the side. The nulls are broadside, and the strongest radiation is in the plane of the loop. This is a key characteristic of small loop antennas.