# Transformers

### Explanation of question 2

The ratio of primary to secondary turns on a step-down transformer is 15:1. When 240V is applied to the primary winding, the secondary will have a terminal voltage of

1. 3600V
2. 256V
3. 16V
4. 4V

The answer is :- 3

The voltage ratio on a transformer is the same as the turns ratio. i.e. if the primary has 15 times more turns than the secondary, then the primary voltage will be 15 times that of the secondary voltage. In this case, secondary voltage = 240/15 = 16V

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