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| Figure 1-16 Turns ratio of transformers. (A) Step-up transformer, (B) Step-down transformer. |

| induced voltage will exactly balance the original voltage in the primary coil; the net result will be a zero voltage and consequently, a zero current. If a load is connected to the secondary, the following will occur: |

| 1. A continuous circuit will be established and current will therefore flow in the secondary coil. |

| 2. This secondary current in turn creates an alternating magnetic field about it, which will tend to induce within itself a voltage of such value as to stop the current from flowing. |

| 3. At the same time, this secondary magnetic field will act on the primary in such a way as to reduce the effect of self-induction in the primary coil. |

| 4. This will allow more current to flow in the primary coil, which in turn will set up a stronger magnetic field. |

| 5. This stronger magnetic field will induce a greater voltage in the secondary coil, which will in turn tend to reduce the effect of self-induction in the secondary coil. |

| Thus, a state of equalization will be reached where the magnetic fields of the primary and secondary are so balanced that the ampere-turns in one match the ampere-turns in the other. |

| As more load is connected to the secondary coil, more paths will be provided for the current to flow. The impedance of the circuit connected to the secondary will be reduced and consequently more current will flow. The |

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