JAMB Physics 2012 Objective — Question 42
Question 42 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2012 Objective paper, with the correct answer and a full explanation.
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Which 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. Graph A
- B. Graph B
- C. Graph CCorrect
- D. Graph D
Explanation
Capacitive reactance Xc = 1/(2πfC) is inversely proportional to frequency, so the graph is a curve that decreases as frequency increases, approaching but never reaching zero — matching graph C.
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