Question 467Electricity & Electronics - QMED

The correct answer is C) it functions to step-down voltage. The device shown in figure "B" of the illustration EL-0083 is likely a transformer, which is used to step-down the voltage from a higher level to a lower level. This is necessary to ensure the electrical load receives the appropriate voltage for its operation, as many electrical devices require a lower voltage than the main power supply. The other answer choices are incorrect because: A) a filter is used to remove unwanted frequency components, not to adjust voltage levels; B) a step-up transformer would increase the voltage, which is the opposite of what is required for the load; and D) a ground isolator is used to separate the ground of two circuits, not to adjust voltage.