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A transformer has 400 turns of wire in the primary coil and 40 turns in...

Physics
WAEC 2014
A transformer has 400 turns of wire in the primary coil and 40 turns in the secondary col. If the input voltage is 150 volts. Calculate the magnitude of the output voltage
  • A. 150V
  • B. 55V
  • C. 36V
  • D. 15V
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Correct Answer: Option D
Explanation
\(\frac{ES}{EP} = \frac{Ns}{Np} = \frac{Es}{150} = \frac{40}{400}\)

Es = \(\frac{150 \times 40}{400}\)

= 15V
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