Question

What is turns ratio also known as?

Answer 1

The turns ratio, also known as the **transformer ratio** or **winding ratio**, refers to the ratio of the number of turns in the primary winding to the number of turns in the secondary winding in a transformer. This ratio is a critical factor in determining how voltages and currents are related between the primary and secondary sides of the transformer.

Mathematically, the turns ratio (denoted as **N₁/N₂**) is expressed as:

\[
\text{Turns Ratio} = \frac{N_1}{N_2}
\]

Where:
- **N₁** is the number of turns in the primary winding.
- **N₂** is the number of turns in the secondary winding.

### Significance of the Turns Ratio:
1. **Voltage Relationship**: The turns ratio directly affects the voltage transformation. According to the principle of electromagnetic induction, the voltage across each winding is proportional to the number of turns. Therefore:
   \[
   \frac{V_1}{V_2} = \frac{N_1}{N_2}
   \]
   Where:
   - **V₁** is the primary voltage.
   - **V₂** is the secondary voltage.

   This means if a transformer has more turns in the primary winding than in the secondary winding (step-down transformer), the voltage in the secondary winding will be lower. Conversely, a step-up transformer will have a higher secondary voltage.

2. **Current Relationship**: The current in a transformer is inversely proportional to the turns ratio, which means:
   \[
   \frac{I_2}{I_1} = \frac{N_1}{N_2}
   \]
   Where:
   - **I₁** is the current in the primary winding.
   - **I₂** is the current in the secondary winding.

   This shows that if the voltage is stepped up, the current is stepped down, and vice versa.

### Other Names for Turns Ratio:
- **Voltage ratio**: Because it governs the proportional change in voltage.
- **Winding ratio**: Since it refers to the number of windings or turns in the transformer coils.

Answer 2

The turns ratio is also known as the **turns ratio** or **winding ratio**. It refers to the ratio of the number of turns of wire in the primary winding of a transformer to the number of turns in the secondary winding.

For example, if a transformer has 100 turns in the primary winding and 50 turns in the secondary winding, the turns ratio is 2:1. This ratio is crucial in determining how the voltage is stepped up or stepped down by the transformer. Specifically, the voltage ratio between the primary and secondary windings is directly proportional to the turns ratio.

So, if the turns ratio is 2:1, and the primary voltage is 240V, the secondary voltage would be 120V.