Question

Which of the following is/are correct regarding Phasor?
(A)Vectors, Phasors, and Phasor Diagrams Only apply to Sinusoidal AC Waveform
(B) A phasor diagram Can be used to Represent two or more Stationary sinusoidal quantities at any instant time.
(C)All phasors are drawn rotating in an anticlockwise direction. All the phasors ahead of the reference phasor are said to be leading while all the phasors behind the reference Phasor are said to be lagging.
\[(A)\] Only (A)
\[(B)\]Both (A) and (B)
\[(C)\]Both (A) and (C)
\[(D)\]All (A),(B), and (C)

Answer 1

Hint: A phasor diagram is used to identify the phase relationship between the two or more sine waves having the same frequency.
All phases are drawn in an anticlockwise direction in the phasor diagram.
The phasor above the reference phasor is said leading while the phasor behind the reference phasor is said lagging.

Complete step-by-step solution:
The Phasor diagrams are used to represent sinusoidal waveforms hence we can add and subtract them to get correct answers. All the sinusoids should share the Common frequency “\[f\] ” for phasor work.
Here,
$A$ is the Amplitude
$P$ is the Phase
Hence, $A$ Should be a positive number and $P$ can be the angle from $0^\circ to360^\circ $
The phasor is similar to the vector, the varying magnitude is the only difference it oscillates between +ve and -ve Peak values. It is also called the Rotating Vector.
The Steady-state linear differential equations are solved by using the phasor; this phasor diagram follows Kirchoff’s Voltage and current law for any circuit. For Voltages, the head of the phasor diagram is taken as positive and the tail of the phasor diagram is taken as negative.
Hence, The option is All (A) (B) and (C).

Note:Voltage and Current not always out of phase in AC circuits. If the circuit is Resistive then no phase difference occurs. The phase difference occurs because of the inductive nature of the loads. The phase difference occurs due to Capacitance in circuits as well. In the Presence of the inductor, it causes a Current lag behind the voltage.