In a transformer, what does the turns ratio determine?

Practice Questions

Q1
In a transformer, what does the turns ratio determine?
  1. The efficiency of the transformer
  2. The voltage transformation
  3. The current rating
  4. The core material

Questions & Step-by-Step Solutions

In a transformer, what does the turns ratio determine?
  • Step 1: Understand that a transformer has two coils of wire called windings: the primary winding and the secondary winding.
  • Step 2: The primary winding is connected to the input voltage source, while the secondary winding provides the output voltage.
  • Step 3: The turns ratio is the number of turns of wire in the primary winding compared to the number of turns in the secondary winding.
  • Step 4: If the primary winding has more turns than the secondary, the transformer decreases the voltage (step-down transformer).
  • Step 5: If the secondary winding has more turns than the primary, the transformer increases the voltage (step-up transformer).
  • Step 6: Therefore, the turns ratio directly affects how much the voltage changes from the primary to the secondary winding.
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