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- Q625 - Electrical, Electronic, & Control Engineering
34. Which of the following pictures shown in the illustration is a control transformer, usually used to step down line voltage for supplying reduced voltage control circuits
Choice B is correct; it depicts a small transformer with distinct primary and secondary terminals designed to reduce voltage for control circuits. Devices A, C, and D are electronic ballasts, current transformers, and power transformers respectively, and do not fulfill the function of a control transformer.
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