North Carolina EMT State Practice Exam

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Prepare for the North Carolina EMT State Exam with interactive quizzes and comprehensive explanations. Master your skills and gain confidence by reviewing key topics before test day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What frequency does Hertz represent?

1 cycle per minute
1 cycle per second
1 cycle per hour
1 cycle per day

The correct answer is: 1 cycle per second

Hertz is defined as the unit of frequency in the International System of Units (SI), which measures the number of cycles per second of a periodic phenomenon. Therefore, when considering what Hertz represents, it is specifically linked to the number of occurrences (or cycles) happening within the span of one second. In practical terms, if something has a frequency of 1 Hertz, it means that it completes one full cycle every second. This unit is widely used in various fields such as physics, engineering, and even in medical equipment like monitors that track heart and respiratory rates, providing a clear and standardized way to measure how often a repetitive event occurs. Other options, such as cycles per minute, hour, or day, do not accurately describe what Hertz represents, as they refer to much larger time frames and would require conversion to express frequency in Hertz.