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What is the voltage in the secondary if the voltage in the primary is 30 V?

1. 45 V
2. 15 V
3. 90 V
4. 300 V

Correct answer: 90 V

Solution

The correct secondary voltage is obtained using the transformer turns ratio. Since the intended ratio gives a threefold increase, the secondary voltage becomes 30 d7 3 = 90 V .

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