If the dose rate is fixed and exposure time doubles, what happens to the total dose?

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Multiple Choice

If the dose rate is fixed and exposure time doubles, what happens to the total dose?

Explanation:
Dose delivered equals dose rate times exposure time. If the dose rate is fixed, the total dose changes in direct proportion to time. So when exposure time doubles, the total dose doubles as well. For example, with a dose rate of 2 mGy per minute, increasing time from 6 minutes to 12 minutes makes the dose go from 12 mGy to 24 mGy. The dose would only quadruple if the time (or rate) increased fourfold, which isn’t the case here.

Dose delivered equals dose rate times exposure time. If the dose rate is fixed, the total dose changes in direct proportion to time. So when exposure time doubles, the total dose doubles as well. For example, with a dose rate of 2 mGy per minute, increasing time from 6 minutes to 12 minutes makes the dose go from 12 mGy to 24 mGy. The dose would only quadruple if the time (or rate) increased fourfold, which isn’t the case here.

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