Waveforms Flashcards
1
Q
Define instantaneous value
A
Value of waveform at some instant in time (t)
2
Q
Define transient
A
a single event in time
3
Q
What is the purpose of the rms value?
A
In AC circuits, values are constantly changing from zero to the peak value so RMS is used to find the average.
4
Q
What are 2 ways of finding rms?
A
-Value /√2
- √((x² + x₁²+ x₂²… )/ n)
5
Q
How do we determine if a waveform is lagging or leading?
A
-When a wave reaches its maximum and minimum before the reference wave
- it is lagging when it does the opposite
6
Q
How do we go from a sine wave to cosine wave?
A
sin(x) = cos(x + π/2)
