Electric Circuits and Networks, Ist Edition by Pearson

[i.e., which comes after which (in a visual sense)] between

them in t or

ω

t axis too, is independent of choice of origin.

However, the phase of a sinusoidal waveform depends on the

choice of origin in t or

ω

t axis.

• When a waveform point on a sinusoidal function v

2

(t) appears

after a similarly located point on the waveform of another

sinusoidal function v

1

(t) with same frequency, v

2

(t) is said to

lag v

1

(t) in phase and

θ

1

–

θ

2

is called a lag phase angle under

this condition.

• Similarly, when a waveform point on a sinusoidal function

v

2

(t) appears before a similarly located point on the waveform

of another sinusoidal function v

1

(t) with same frequency ...