Transformer Formula - Definition, Equations, Examples

What is a Transformer?

Basic Components of a Transformer

A transformer consists of two main components:

1. Primary Coil (Winding): This coil is connected to the input voltage source.
2. Secondary Coil (Winding): This coil is connected to the output load.

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The operation of a transformer is based on two fundamental principles:

1. Faraday's Law of Electromagnetic Induction: This law states that when the magnetic field linking a conductor changes, it induces an electromotive force (EMF) or voltage in the conductor. In the case of a transformer, changing the magnetic field is achieved by alternating current (AC) in the primary coil.
2. Mutual Induction: When two coils are placed close together, as in a transformer, a change in current in one coil induces a voltage in the other coil if they are magnetically coupled. This is known as mutual induction.

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Here's how a transformer works step by step:

1. AC Input

2. Magnetic Field Induction

3. Voltage Transformation

4. Output Voltage and Current

5. Efficiency

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Transformer Formula for Current

Where:

Transformer Formula for Voltage

Where:

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Solved Examples Of Transformer Formula