Question 191Electricity & Electronics - Assistant Engineer

The correct answer is B) cycles per second. Hertz (Hz) is a unit of frequency, which measures the number of cycles or oscillations that occur per second. Specifically, 1 hertz represents 1 cycle per second. Therefore, the unit "hertz" is best described as cycles per second, which matches answer choice B. The other answer choices are incorrect because they do not accurately describe the unit of hertz. Revolutions per minute (A) and revolutions per second (D) measure rotational speed, not frequency. Coulombs per second (C) is a unit of electric current, not frequency.