BASIC ELECTRICAL ENGINEERING Lecture 1: Single phase AC Circuits
20 Jun 2021
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Document Summary
Important terms associated with an alternating quantity are defined below. Waveform - the graph of alternating quantity (voltage or current) vs time is called waveform. Generally, alternating quantity is depicted along the y-axis and time along x-axis. Amplitude - it is the maximum value attained by an alternating quantity, also called as maximum or peak value. Cycle: a set of positive and negative half cycle (emf or current) is called one cycle. Time period (t) - it is the time taken in seconds to complete one cycle of an alternating quantity. Frequency (f) - it is the number of cycles that occur in one second. The unit for frequency is hz or cycles/sec. The relationship between frequency and time period can be derived as: Time taken to complete f cycles = 1 second, time taken to complete 1 cycle = 1/f second.
