Here we have a transformer with 10 times as many turns in the primary winding (on the right) as in the secondary (on the left). As a result, the voltage in the secondary winding is 1/10 of the primary voltage. (It is not exactly 12 V because of the resistance in the primary winding and the imperfect coupling between the two windings.) If the secondary winding were shorted (the resistor replaced by a wire), the primary current would be much larger, and the secondary current would be 10 times the primary current.
This page is a utility for simulating понижающий трансформатор online with specified initial values.










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