You Do Need power plug adapter while traveling from Faroe Islands to Sri Lanka.

Here is Why You Need An Adapter

The outlet and plug type used in Sri Lanka is G and in Faroe Islands are C, E, F and K. This is how they look like.

Faroe Islands

In Faroe Islands, outlets of type C, E, F and K are in use.

Type C

Type E

Type F

Type K

Sri Lanka

In Sri Lanka, outlets of type G are in use.

Type G