The voltage transformation ratio of a transformer is equal to the ratio of_______________?
Correct answer: C. secondary induced e.m.f. to primary induced e.m.f
- A. primary turns to secondary turns
- B. secondary current to primary current
- C. secondary induced e.m.f. to primary induced e.m.f
- D. secondary terminal voltage to primary applied voltage
Explanation
From the transformer emf equation, induced emf is proportional to the number of turns, so the voltage ratio is E₂/E₁ = N₂/N₁. Terminal-voltage ratios are approximately equal but include the effect of voltage drops.
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