You Do Need power plug adapter while traveling from Israel to Cambodia.

Here is Why You Need An Adapter

The outlet and plug type used in Cambodia are A, C and G and in Israel are C and H. This is how they look like.

Israel

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

Type C

Type H

Cambodia

In Cambodia, outlets of type A, C and G are in use.

Type A

Type C

Type G