A step-down transformer does what?

A step-down transformer does what?

• A. Keeps voltage the same from primary to secondary
• B. Decreases voltage from primary to secondary
• C. Increases voltage from primary to secondary
• D. Converts AC to DC

Answer: (B)

A step-down transformer lowers the voltage on the secondary side compared to the primary. It has two windings, and the secondary winding has fewer turns than the primary, so the induced voltage on the secondary is smaller according to the turns ratio. Power is roughly conserved (minus losses), so the current on the secondary increases as voltage decreases. It’s designed to work with AC only and does not convert AC to DC. So its purpose is to decrease voltage from the primary to the secondary.

A step-down transformer lowers the voltage on the secondary side compared to the primary. It has two windings, and the secondary winding has fewer turns than the primary, so the induced voltage on the secondary is smaller according to the turns ratio. Power is roughly conserved (minus losses), so the current on the secondary increases as voltage decreases. It’s designed to work with AC only and does not convert AC to DC. So its purpose is to decrease voltage from the primary to the secondary.