A transformer is a device used to
A. transform an alternating current into a direct current.
B. transform a direct current into an alternating current.
C. increase or decrease an ac voltage.
D. increase or decrease a dc voltage.
Answer:C
A transformer is a device used to
A. transform an alternating current into a direct current. B. transform a direct current into an alternating current. C. increase or decrease an ac voltage. D. increase or decrease a dc voltage.