🔍 Key Concepts

• Transformer turns ratio vs. voltage ratio (primary turns : secondary turns) • Impedance ratio vs. turns ratio relationship in ideal transformers • How ohms seen at primary or secondary side change with step-up / step-down transformers

💭 Think About

• If you double the turns, what happens to the voltage? What happens to the impedance seen on the other side? • Think about whether impedance changes linearly with turns, or with some power (square, square root, etc.). • Work from a known simple example: a 2:1 transformer with a 4-ohm load. What impedance is reflected to the primary?

✅ Before You Answer

• Remember that voltage ratio equals turns ratio in an ideal transformer. • Remember that impedance depends on both voltage and current, not just one of them. • Check whether the impedance ratio is proportional to the turns ratio, its square, or its square root before matching to the choices.