If EMF intensity increases, what happens to hazard distance?

• A. Decreases
• B. Increases
• C. Stays the same
• D. It varies unpredictably

Answer: (B)

Hazard distance is the zone around a source where exposure meets the regulatory limit. The field strength from a source weakens with distance, so when the source’s EMF intensity is higher, you must be farther away to bring exposure down to the safe level. That means the hazard distance grows as the source power increases. A low-power device has a small hazard radius, while a high-power transmitter has a much larger one. The exact distance depends on frequency and geometry, but the direction is clear: increasing EMF intensity increases hazard distance.