What is a transformer?

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Multiple Choice

What is a transformer?

Transformers change voltage levels of AC power by magnetically coupling energy between two or more windings. When alternating current flows in the primary winding, it creates a changing magnetic flux that induces a voltage in the secondary winding. The amount of voltage change depends on the turns ratio between the windings, allowing the device to step voltage up or down while keeping the same frequency. They transfer energy efficiently rather than storing it, and they don’t generate electricity themselves or measure current. The description that best matches what a transformer does is that it converts electric current from one potential difference to another, which is exactly the function of altering voltage levels via magnetic induction.

Transformers change voltage levels of AC power by magnetically coupling energy between two or more windings. When alternating current flows in the primary winding, it creates a changing magnetic flux that induces a voltage in the secondary winding. The amount of voltage change depends on the turns ratio between the windings, allowing the device to step voltage up or down while keeping the same frequency. They transfer energy efficiently rather than storing it, and they don’t generate electricity themselves or measure current. The description that best matches what a transformer does is that it converts electric current from one potential difference to another, which is exactly the function of altering voltage levels via magnetic induction.

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