You Do Need power plug adapter while traveling from Brazil to United Arab Emirates (UAE).

Here is Why You Need An Adapter

The outlet and plug type used in United Arab Emirates (UAE) is G and in Brazil are C and N. This is how they look like.

Brazil

In Brazil, outlets of type C and N are in use.

Type C

Type N

United Arab Emirates (UAE)

In United Arab Emirates (UAE), outlets of type G are in use.

Type G