Exam-style question
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If a transformer has a primary voltage of 240 V and a secondary voltage of 120 V, what is the turns ratio of the transformer?.
- A.1:2
- B.2:1
- C.1:1
- D.3:1
Model answer
What a good answer should say
- 2:1
Explanation
Why this works
The turns ratio can be calculated using the formula: turns ratio = Vp / Vs. Substituting the values, we have turns ratio = 240 V / 120 V = 2:1.
This indicates that there are twice as many turns in the primary coil compared to the secondary coil.
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