What is the unit symbol for frequency?

• A. s
• B. Hz
• C. N
• D. w

Answer: (B)

The unit symbol for frequency is expressed as Hz, which stands for Hertz. This unit measures how many cycles or occurrences of a repeating event happen per second. One Hertz is equivalent to one cycle per second. The term is named after Heinrich Hertz, a physicist who made significant contributions to the study of electromagnetism.

In the context of electrical science, frequency is crucial as it relates to the behavior of alternating current (AC) systems, radio waves, and other phenomena where periodic motion or changes are involved. Understanding frequency is important for calculating electrical parameters and ensuring the proper functioning of devices that operate on AC.

Other options represent different physical quantities: "s" is the symbol for seconds, a unit of time; "N" symbolizes newtons, the unit of force; and "w" refers to watts, the unit of power. Each of these units plays a significant role in various branches of physics and engineering, but none pertains to the measurement of frequency.