A "step-down" transformer is used to reduce the voltage from 11060 V to 240 V before it is connected to houses in a neighborhood. If the transformer has 50 turns on the secondary, how many turns does it have on the primary

N₁ = 2304 turns

Explanation:

The ratio of a transformer is

          ΔV₁ / N₁ = ΔV₂ / N₂

Let's use index 1 for primary and index 2 for secondary

          N₁ = ΔV₁ / ΔV₂ N₂

Let's calculate

        N1 = 11060/240 50

        N1 = 2304 turns

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