WAEC Physics 2025 Objective — Question 19
Question 19 of 51 from the West African Examinations Council (WAEC) Physics 2025 Objective paper, with the correct answer and a full explanation.
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Use the circuit diagram to answer this question. Calculate the terminal p.d. of the battery in the diagram.
- A. 7.20V
- B. 7.50V
- C. 10.80VCorrect
- D. 11.25V
Explanation
E.m.f. = IR, where I = 1.5A is the total current and R = 7.2Ω is the total external resistance. E.m.f. = 1.5×7.2 = 10.80V.
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