A step down transformer has
- A. more turns on the secondary than the primary
- B. fewer turns on the secondary than the primary, giving a lower output voltage
- C. the same number of turns on both
- D. no core
Explanation
Voltage divides in the ratio of the turns, so fewer secondary turns give a lower voltage, and for an ideal transformer the current rises in the same proportion so that power is conserved. This is what a phone charger does, dropping 220 V to a few volts. A step up transformer reverses the turns ratio.
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