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What principle is used in transformer?

in Electrical Engineering

What principle is used in transformer?

1 Answer

A **transformer** works based on the principle of **electromagnetic induction**, specifically **mutual induction**.

### Key Principle: **Mutual Induction**

When an alternating current (AC) flows through the **primary coil**, it generates a **changing magnetic field**. This changing magnetic field then induces a voltage in the **secondary coil** if it is placed within the magnetic field — this is called **mutual induction**.

### Supporting Concepts:

* **Faraday’s Law of Electromagnetic Induction**: The induced EMF (electromotive force) in a coil is proportional to the rate of change of magnetic flux.
* **Lenz's Law**: The direction of the induced EMF is such that it opposes the change in magnetic flux that produced it.

Would you like a simple diagram to help visualize this?

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