What is an autotransformer and what does it do?

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Multiple Choice

What is an autotransformer and what does it do?

An autotransformer uses a single winding with taps to adjust voltage. In dental X-ray equipment, its job isn’t to create the high voltage by itself but to keep the electrical input to the high-voltage system stable. By selecting different taps, it compensates for small fluctuations in the incoming power, delivering a more consistent voltage to the next stage of the circuit. This makes the exposure more reliable even when line voltage varies. That stability role is why this is the best description. It’s not primarily a device that generates high voltage on its own, nor a rectifier, and it isn’t specifically the transformer used to power the filament.

An autotransformer uses a single winding with taps to adjust voltage. In dental X-ray equipment, its job isn’t to create the high voltage by itself but to keep the electrical input to the high-voltage system stable. By selecting different taps, it compensates for small fluctuations in the incoming power, delivering a more consistent voltage to the next stage of the circuit. This makes the exposure more reliable even when line voltage varies.

That stability role is why this is the best description. It’s not primarily a device that generates high voltage on its own, nor a rectifier, and it isn’t specifically the transformer used to power the filament.

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