Cite the units of measure for voltage and current. D escribe the difference between DC and AC voltage and current.
D escribe the shape and main features of a sinusoidal waveform.
Calculate the instantaneous value of a current or voltage sine waveform, given the maximum value and angular displacement. AC voltage switches polarity back and forth. There are numerous sources of DC and AC current and voltage. The vertical axis represents the amplitude of the AC current or voltage, in amperes or volts. The horizontal axis represents the angular displacement of the waveform.