Question 42
Alternating Current CircuitsWhich of the following is the correct shape of the graph of capacitive reactance Xc versus frequency F for a pure capacitor in an a.c. circuit?
- A.A
- B.B
- C.C
- D.D
Show the answer and explanation
Answer: D (D)
Explanation
Xc = 1/(2πfC), so the reactance is inversely proportional to frequency. Its graph is a curve falling towards the frequency axis, as in D.