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G5C05
Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?
Pick an answer to check it.
Answer: B. To accommodate the higher current of the primary
A step-up transformer raises voltage but lowers current, so the primary carries more current than the secondary. Thicker wire on the primary handles that higher current.
Tip: Low voltage side = high current = thick wire.