Which of the following transformers reduces the voltage on the secondary side to provide an appropriate current to heat the filament?

Question

Quizplus · Accepted Answer

A step-down transformer reduces the voltage on the secondary side to provide an appropriate current to heat the filament. This is necessary for devices like X-ray tubes, where a high voltage is required to produce X-rays but a lower voltage is needed to heat the filament. Autotransformers only change the voltage level, and step-up transformers increase voltage, so neither of these choices would be suitable for heating a filament. An mA meter is an instrument used for measuring current, so it is not relevant to this question.

Which of the Following Transformers Reduces the Voltage on the Secondary