Electrical Engineering · Transformers
An auto-transformer is cheaper in cost because there is a saving in copper as compared to a conventional two-winding transformer. This is because the volume of copper used is proportional to which of the following relationships?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The volume of copper used = (cross-sectional area) × (length of the conductor used for windings)✓
- 2The volume of copper used = (cross-sectional area) / (length of the conductor used for windings)
- 3The volume of copper used = (cross-sectional area) - (length of the conductor used for windings)
- 4The volume of copper used = (cross-sectional area) + (length of the conductor used for windings)
Correct answer
The volume of copper used = (cross-sectional area) × (length of the conductor used for windings)
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