The primary side of a transformer is known as the ____ side.

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Multiple Choice

The primary side of a transformer is known as the ____ side.

In transformer diagrams, the winding you energize from the power source is the primary side. Designers often place the primary on the left and the secondary on the right, so the left-hand side becomes the primary in many drawings. This convention makes it easy to trace the flow of energy from input to output as you read diagrams from left to right. The other labels—front, back, or right—don’t signify electrical function on standard schematics; they’re about physical orientation and don’t define which winding is the input. So, the left side is the primary side.

In transformer diagrams, the winding you energize from the power source is the primary side. Designers often place the primary on the left and the secondary on the right, so the left-hand side becomes the primary in many drawings. This convention makes it easy to trace the flow of energy from input to output as you read diagrams from left to right. The other labels—front, back, or right—don’t signify electrical function on standard schematics; they’re about physical orientation and don’t define which winding is the input. So, the left side is the primary side.

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