You Do Need power plug adapter while traveling from Palestine to Ethiopia.

Here is Why You Need An Adapter

The outlet and plug type used in Ethiopia are C, F and G and in Palestine are C and H. This is how they look like.

Palestine

In Palestine, outlets of type C and H are in use.

Type C

Type H

Ethiopia

In Ethiopia, outlets of type C, F and G are in use.

Type C

Type F

Type G