Capacitor Only Circuit

Question 1

Sinusoidal expressions of capacitor only ac circuit of V and I

Answer 1

V = V’sinwt
I = I’sin(wt + π/2)

Question 2

Phase difference between I and V in capacitor only ac circuit

Answer 2

ø = π/2
CURRENT LEADS

Question 3

Avg power of capacitor only circuit

Answer 3

Pavg = 0 as cosø = cosπ/2 = 0
(Wattless circuit)

Question 4

Inductive reactance Xofc =? In terms of w, which plays role of resistance

Answer 4

Xofc = 1/cw
Unit- ohm

Question 5

Relation between I’ and V’ in capacitor only ac circuit

Answer 5

I’ = V’/Xofc

Question 6

Relation between Irms and Vrms in capacitor only ac circuit

Answer 6

Irms = Vrms/XofC