WAEC Physics 2021 Objective — Question 22

Question 22 of 50 from the West African Examinations Council (WAEC) Physics 2021 Objective paper, with the correct answer and a full explanation.

22. The diagram above is an illustration of an a.c. circuit. Calculate the reactance of the capacitor.

• A. 2016 Ω
• B. 2000 Ω
• C. 200 ΩCorrect
• D. 4000 Ω

Explanation

Xc=1/(2πfC). With f=500/π Hz and C=5µF: Xc=1/(2π×(500/π)×5×10⁻⁶)=10⁶/5000=200 Ω.

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