Respuesta :
Step-up transformers are used in the transmission of electrical energy by increasing the voltage for efficient long-distance transmission. Step-up transformers increases the voltage which will increase resistance at constant current. At a lower current value, transmission is much more efficient.
Answer choices:
A. They increase the voltage and the current for a home.
B. They decrease the voltage before it leaves a power plant.
C. They increase the voltage for efficient long-distance transmission.
D. All of the above.
The answer is C. I hope this helps!
