JAMB Physics 2019 Objective — Question 30
Question 30 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2019 Objective paper, with the correct answer and a full explanation.
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A transformer has a primary coil with 500 turns and a secondary coil with 2500 turns. When the voltage input to the primary is 120v, the output is
- A. 6000v
- B. 600vCorrect
- C. 240v
- D. 60v
Explanation
Nₛ/Nₚ = Vₛ/Vₚ ⇒ Vₛ = Vₚ×(Nₛ/Nₚ) = 120×(2500/500) = 600V.
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