🔍 Key Concepts
• Effect of contamination on electrical insulation (leakage paths, surface tracking)
• Antenna efficiency and radiation power when there are losses on the feed/insulation surfaces
• High-voltage corona discharge behavior on dirty or salty insulators
💭 Think About
• Think about what happens when moisture, salt, or dirt on an insulator creates a partial conductive path—how might that affect the actual power getting to the antenna?
• If high voltages are involved, how does contamination on the surface of insulators influence the likelihood of corona discharge?
• Could contamination cause measurement instruments (like antenna current meters) to show unstable or misleading readings, and if so, why?
✅ Before You Answer
• Verify how surface leakage or partial shorts affect: (1) current readings, (2) radiated power, and (3) high-voltage behavior like corona
• Check whether dirty or salt-encrusted insulation typically causes only one of the listed effects, or if it tends to cause multiple related problems at the same time
• Consider that salt and dirt plus moisture can turn an insulator into a resistive path, and trace what that would do to each option A, B, and C before choosing your answer