What are the differences between 120v and 240v electrical systems and how do these differences impact household appliances and electronics?

The main difference between 120v and 240v electrical systems is the voltage they provide. 120v systems are commonly used in households, while 240v systems are typically used for larger appliances like stoves and dryers. The higher voltage of 240v systems allows appliances to operate more efficiently and handle heavier loads. However, not all household appliances are compatible with 240v systems, so it's important to check the voltage requirements before using them.