R-C circuits

Question 1

Sinusoidal expressions of V and I in RC circuits

Answer 1

V = V’sinwt
I = I’sin(wt + ø)

Question 2

Relation of V and I in RC ac circuit

Answer 2

VofR = I’R
Vofc = I’Xofc

Question 3

Equation of voltage phasor diagram of RC ac circuit

Answer 3

V = √(VofR² + Vofc²)
Tanø = Vofc/VofR

Question 4

Equation of impedance phasor diagram of RC ac circuit

Answer 4

Z = √(R² + Xofc²)
Tanø = Xofc/R
I’Z = V’
IrmsZ = Vrms