SOLUTION

• The number of turns on the primary and secondary windings depends upon their respective voltages.
• A high-voltage winding has far more turns than a low-voltage winding.
• On the other hand, the current in a high-voltage winding is much smaller, enabling us to use a smaller size conductor.
• The result is that the amount of copper in the primary and secondary windings is about the same.
• If a transformer has more turns in the secondary winding than in the primary winding, the secondary voltage is higher than the primary voltage and it is a step-up transformer.
• If a transformer has more turns in the primary winding than in the secondary winding, the primary voltage is higher than the secondary voltage. This means that the voltage has been decreased, or “stepped down.”