🔍 Key Concepts

• Autotransformer voltage ratios between line (full) voltage and a tapped portion (e.g., 50%) • The relationship between voltage and current in a transformer for a given power (VA = volts × amps) • How step-down voltage affects current on the load side compared with the line side

💭 Think About

• If the load is connected to the 50% tap, what fraction of the line voltage does that load actually see? • For an ideal transformer, when voltage goes down, what happens to current to keep power approximately constant? Does it go up, go down, or stay the same? • Compare each answer choice: which one matches the expected tradeoff between voltage and current at a 50% tap?

✅ Before You Answer

• Confirm that 50% tap means the load is across half the winding, not the full line voltage • Remember that in a transformer, power (VA) is approximately conserved: ( V_{primary} I_{primary} \approx V_{secondary} I_{secondary} ) • Check that the option you pick has voltage and current changing in opposite directions in a way that keeps VA roughly the same (if one halves, the other should roughly double, and vice versa)