WAEC Physics 2018 Objective — Question 44
Question 44 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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In a series R.L.C. circuit, R = 10Ω, Xc = 4Ω and XL = 9Ω. The impedance of the circuit is
- A. 4.1
- B. 5.0
- C. 10.8
- D. 11.2Correct
Explanation
Z = √[R²+(XL−Xc)²] = √[10²+5²] = √125 ≈ 11.2Ω.
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