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JAMB Physics 1985 Question 46

Question 46

Electromagnetic Induction

A transformer has a primary coil with 500 turns and a secondary coil with 2500 turns. When the voltage input to the primary coil is 120 V, the output is

  1. A.6000 V
  2. B.600 V
  3. C.240 V
  4. D.60 V
  5. E.24 V
Show the answer and explanation

Answer: B (600 V)

Explanation

Vs = Vp × Ns/Np = 120 × 2500/500 = 600 V.