In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: What equals the output power divided by the input power? Answer: efficiency

A: Efficiency equals the output power divided by the input power.
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Q: Question: How does the magnetic field produced by a current in a wire move? Answer: in concentric circles

A: The magnetic field produced by a  current in a wire moves in concentric circles.
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Q: Question: Bacteria may divide several what an hour? Answer: times

A:
Bacteria may divide several times an hour.
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