What does intensity of EMF mean?

• A. The length of exposure time
• B. Higher intensity equals larger hazard distance
• C. The energy deposited per pulse
• D. The distance from the source

Answer: (B)

The main idea is that EMF intensity describes how strong the electromagnetic field is at a location—the rate at which energy is flowing through or deposited in a area, often expressed as energy per unit area per unit time. This strength determines how much exposure a person or object would receive if they were at that point. When safety guidelines specify a limit, the region where the field exceeds that limit defines a hazard zone. If the source emits a higher intensity, that threshold boundary sits farther from the source, so the hazard distance increases. In other words, intensity is about the field’s strength, not how long you’re exposed, not the energy delivered in a single pulse, and not simply the distance from the source—the distance is what grows as the field strength remains above safe levels.