*Question E4E07:
Which of the following can cause shielded cables to radiate or receive interference?*  

*Correct Answer is  B: Common-mode currents on the shield and conductors*  

### AI Response: (may contain errors)  

**Explanation:**

1. **Correct Answer: B - Common-mode currents on the shield and conductors**

   - **Common-mode currents** occur when the same current flows in the same direction on both the shield and the conductors inside the cable. This can cause the shield to act like an antenna, radiating or receiving unwanted signals. The shield is supposed to block interference, but common-mode currents can bypass this protection, leading to interference issues.

2. **Why the other choices are incorrect:**

   - **A: Low inductance ground connections at both ends of the shield**
     - Low inductance ground connections are generally beneficial because they help maintain a good ground reference and reduce the potential for interference. They do not cause the shield to radiate or receive interference.

   - **C: Use of braided shielding material**
     - Braided shielding is commonly used in cables to provide effective electromagnetic interference (EMI) protection. It does not inherently cause the cable to radiate or receive interference. The effectiveness depends on the quality and coverage of the braid.

   - **D: Tying all ground connections to a common point resulting in differential-mode currents in the shield**
     - Tying ground connections to a common point is a good practice to avoid ground loops and reduce interference. Differential-mode currents involve currents flowing in opposite directions on the conductors, which do not typically cause the shield to radiate.

**Key Concept:**

- **Common-mode vs. Differential-mode Currents:**
  - **Common-mode currents** flow in the same direction on all conductors, including the shield, and can cause radiation.
  - **Differential-mode currents** flow in opposite directions on paired conductors and are less likely to cause the shield to radiate.

Understanding these concepts helps in diagnosing and preventing interference issues in shielded cables.