WAEC Physics 2021 Objective — Question 11

Question 11 of 50 from the West African Examinations Council (WAEC) Physics 2021 Objective paper, with the correct answer and a full explanation.

11. Which of the following actions will increase the capacitance of a parallel plate capacitor? I. Decreasing the distance between the plates II. Increasing the distance between the plates III. Increasing the area of the plates overlap IV. Avoiding the use of dielectric between the plates

A. I and III onlyCorrect
B. II and III only
C. I and IV only
D. II and IV only

Explanation

Capacitance C=ε₀εrA/d increases when plate separation (d) decreases and when overlapping plate area (A) increases — statements I and III.

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