PhysicsElectromagnetic inductionWAEC
A transformer has 100 turns on the primary coil and 500 turns on the secondary. If the primary voltage is 20 V, the secondary voltage is
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Answer: B. 100 V
Vs/Vp = Ns/Np, so Vs = 20 × 500/100 = 100 V.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.