0
\$\begingroup\$

A laptop charger has 3 pins - positive,negative,earth at the end which is inserted into the switch board. But, the end inserted into the laptop has only 1 pin(don't know what that is). A battery also positive and negative terminals. So how does this one pin suffice the two pin battery?

\$\endgroup\$
3
\$\begingroup\$

That single "pin" is known as a "barrel connector" and has two contacts — one on the outside and a separate one on the inside.

photo

The advantage of this coaxial arrangement is that the connector has no preferred orientation, and can even swivel while in use.

|improve this answer|||||
\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.