WAEC - Physics (2020 - No. 13)
An electrical device has 50 turns in its primary coil and 20 turns in the secondary coil. The device can be a\an?
step-up transformer
step-down transformer
d.c generator
a.c generator
解释
In a step down transformer, there are more turns in the primary coil than in the secondary coil and more current flows in the secondary circuit than in the primary.