why do computer charges have that big block

Question

for example, on my windows laptop, there is the plug that goes into the outlet, some wire, a big block of plastic, and then more wire that connects to the charger that goes into the charging port. why is that block there?

In: Technology

Answer 1

Computers are relatively fragile, and can’t handle the electricity that comes out of the wall. It needs the block to tune the electricity to what it can use. Big desktop computers have to do the same thing, but since they’re already big, the block is inside. In both cases, they’re called a power supply.