Final answer:
AC voltage is easier to raise and lower than DC voltage, making it more suitable for power distribution systems. Transformers play a crucial role in changing voltage in power distribution systems.
Step-by-step explanation:
AC voltage is much easier to raise and lower than DC voltage, which is why AC is used in most large-scale power distribution systems. AC voltage can be transmitted with much smaller power losses than DC voltage, making it more economical for transmitting power over long distances. Transformers are used to change the voltage in power distribution systems, and it is easier to increase and decrease AC voltages with transformers than it is with DC voltages.