33 - Phasors | Determine which is Leading or Lagging | Solving Phase Difference between Sinusoidal Q

33 - Phasor Quantities (Which is Leading or lagging)

In todays video we are going to learn how to identify which sinusoidal quantity is leading and which one is lagging

A phasor is a complex number that represents the amplitude and phase of a sinusoid.

A sinusoid is a signal that has the form of the sine or the cosine function. A sinusoidal voltage is the one that produces the sinusoidal current unless the circuit is non-linear.
v(t) = Vm sin (wt+φ) or v(t) = Vm cos (wt+φ)
where,
Vm = amplitude (V)
w = angular frequency (rad/s)
wt = argument (rad or degrees)

Phasors
if V1 = Vm sin (wt) and V2 = Vm sin (wt+φ), then
V2 is said to lead V1 by φ
or V1 lags V2 by φ

if φ = 0, V1 and V2 are in phase,
if φ is not = 0, V1 and V2 are not in phase.

00:00 - Explained Examples
07:02 - Example 1a and b
12:16 - Example 2a and b