Frequency
Topic: Frequency , Angular Frequency and Period Video Tutorial
Lectured by : ARMAN ALI (North South University-Department of Electrical and Computer Engineering)Frequency : Frequency is the number of occurrences of a repeating event per unit of time. It is also referred to as temporal frequency, which emphasizes the contrast to spatial frequency and angular frequency. The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency. Angular Frequency : Angular frequency (ω), also known as radial or circular frequency, measures angular displacement per unit time. Its units are therefore degrees (or radians) per second. Angular frequency (in radians) is larger than regular frequency (in Hz) by a factor of 2Ï€: ω = 2Ï€f. Hence, 1 Hz ≈ 6.28 rad/sec. Period T : A period T is the time required for one complete cycle of vibration to pass a given point. As the frequency of a wave increases, the period of the wave decreases. Frequency and Period are in reciprocal relationships and can be expressed mathematically as: Period equals the Total time divided by the Number of cycles.
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