What is the turns ratio of a transformer with primary 7200 V and secondary 240 V?

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Multiple Choice

What is the turns ratio of a transformer with primary 7200 V and secondary 240 V?

In an ideal transformer, the turns ratio equals the voltage ratio: Np:Ns = Vp:Vs. With a primary voltage of 7200 V and a secondary voltage of 240 V, the ratio is 7200/240 = 30. So the turns ratio is 30:1 (np:ns). This means the primary has 30 times as many turns as the secondary. If you were asked for the reverse (secondary to primary), it would be 1:30, but for this question the correct orientation is 30:1.

In an ideal transformer, the turns ratio equals the voltage ratio: Np:Ns = Vp:Vs. With a primary voltage of 7200 V and a secondary voltage of 240 V, the ratio is 7200/240 = 30. So the turns ratio is 30:1 (np:ns). This means the primary has 30 times as many turns as the secondary. If you were asked for the reverse (secondary to primary), it would be 1:30, but for this question the correct orientation is 30:1.

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