In a step down transformer, the input voltage is 200 V and theoutputvoltage is 5 volts the turn ratio of the transformer.
Correct answer: D. 40:1
- A. 1:20
- B. 1:40
- C. 20:1
- D. 40:1
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About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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