Post-UTME Physics 2016 Objective — Question 13
Question 13 of 20 from the Post-UTME Screening (Post-UTME) Physics 2016 Objective paper, with the correct answer and a full explanation.
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A current of 5A flowing in a circuit falls to zero in 0.1 sec. If the average e.m.f of 200V is induced, what is the self-inductance of the circuit?
- A. 5
- B. 4Correct
- C. 40
- D. 20
Explanation
emf = L(dI/dt). L = emf/(dI/dt) = 200/(5/0.1) = 200/50 = 4H.
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