JAMB Physics 2025 Objective — Question 30
Question 30 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2025 Objective paper, with the correct answer and a full explanation.
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A transformer has 500 primary turns and 100 secondary turns. If 240 V AC is applied, the secondary voltage is:
- A. 48 VCorrect
- B. 80 V
- C. 1200 V
- D. 120 V
Explanation
V_s=V_p×(N_s/N_p)=240×(100/500)=48 V.
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