Which primary protection strategy minimizes exposure by limiting time spent near a radiation source?

Which primary protection strategy minimizes exposure by limiting time spent near a radiation source?

• A. Time
• B. Distance
• C. Shielding
• D. Inverse-square law

Answer: (A)

Exposure accumulates with the time you spend near a source, so the total dose is the dose rate multiplied by the time of exposure. By shortening the time you’re exposed, you reduce the total dose directly. For example, if the dose rate is constant, halving the time halves the dose. Distance and shielding change how strong the dose rate is, but the question focuses on minimizing exposure specifically by limiting time near the source, which is why this approach is the best fit.

Exposure accumulates with the time you spend near a source, so the total dose is the dose rate multiplied by the time of exposure. By shortening the time you’re exposed, you reduce the total dose directly. For example, if the dose rate is constant, halving the time halves the dose. Distance and shielding change how strong the dose rate is, but the question focuses on minimizing exposure specifically by limiting time near the source, which is why this approach is the best fit.