My question might be a very stupid question but I could not find any answer on Google so decided to ask it.
Now, how will this charger work? In our homes we have 2 pin chargers. One pin has constant potential while the potential at the other pin changes. Applying a resistance between them we complete the circuit and current flows. But how does this make sense in laptop? With one pin you can't complete the circuit. If laptop had any earthing it would make sense to use the live wire pin and using the earthing to complete the circuit but clearly laptop doesn't have earthing. So how does this work?
The only solution I came to was that the pin has 3 layers. The tip, say, is live wire below it is some insulator and below that we must have the neutral wire. However looking at this image, I don't think that it is a correct explanation.