What is the function of the step-up transformer in a dental x-ray machine?

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Multiple Choice

What is the function of the step-up transformer in a dental x-ray machine?

The function being tested is boosting the mains supply to the very high voltage needed to accelerate electrons in the X-ray tube. The dental X-ray tube requires tens of kilovolts to push electrons from the cathode to the anode, so the step-up transformer raises the incoming line voltage (about 110–240 V) to roughly 65,000–100,000 V for the high‑voltage circuit. After stepping up, that high voltage is typically rectified to DC before driving the tube, ensuring a stable accelerating potential. The filament heater, which needs only a few volts (about 3–5 V), is supplied by a separate low-voltage circuit, not by the step-up transformer. The step-up device does not convert AC to DC by itself, nor does it regulate the line voltage; those roles are handled by rectifier and regulator components in the system.

The function being tested is boosting the mains supply to the very high voltage needed to accelerate electrons in the X-ray tube. The dental X-ray tube requires tens of kilovolts to push electrons from the cathode to the anode, so the step-up transformer raises the incoming line voltage (about 110–240 V) to roughly 65,000–100,000 V for the high‑voltage circuit. After stepping up, that high voltage is typically rectified to DC before driving the tube, ensuring a stable accelerating potential. The filament heater, which needs only a few volts (about 3–5 V), is supplied by a separate low-voltage circuit, not by the step-up transformer. The step-up device does not convert AC to DC by itself, nor does it regulate the line voltage; those roles are handled by rectifier and regulator components in the system.

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