Post-UTME Physics 2018 Objective — Question 6
Question 6 of 20 from the Post-UTME Screening (Post-UTME) Physics 2018 Objective paper, with the correct answer and a full explanation.
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In a step-up transformer, the turns ratio is 6:1. If the primary e.m.f. is 3V, find the secondary e.m.f.
- A. 6V
- B. 17V
- C. 18VCorrect
- D. 24V
Explanation
Secondary emf = primary emf x turns ratio = 3 x 6 = 18V.
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