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

The block changes AC power to DC power, and it is on the cord so that it isn’t inside your laptop, since that would make your laptop bigger and heavier.