WAEC Physics 2018 Objective — Question 40
Question 40 of 50 from the West African Examinations Council (WAEC) Physics 2018 Objective paper, with the correct answer and a full explanation.
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Which of the following statements about parallel plate capacitors is/are correct? I. Capacitance of the capacitor is inversely proportional to the distance between the plates II. Capacitors can filter a.c. signals from d.c. III. Capacitors can store charges
- A. I only
- B. I and II only
- C. II and III only
- D. I, II and IIICorrect
Explanation
C=εA/d (inversely proportional to plate separation — I true); capacitors block d.c. while passing a.c., acting as filters (II true); and storing charge is a capacitor's basic function (III true).
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