Question 461Electricity & Electronics - QMED
70% to passWhich of the listed transformers uses a single winding to produce voltage transformation?
AStep-up transformers
BAutotransformers
CStep-down transformers
DIsolation transformers
AI Explanation
The correct answer is B) Autotransformers. Autotransformers use a single winding to produce voltage transformation, unlike step-up, step-down, and isolation transformers which require two separate windings. In an autotransformer, a portion of the winding is used as the primary and the remainder as the secondary, allowing for a more compact and cost-effective design compared to traditional two-winding transformers. The other options are incorrect because step-up, step-down, and isolation transformers all require two separate windings to achieve voltage transformation, rather than utilizing a single winding like an autotransformer.
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