Answer
Five nodes joining (B,D), (D,G) (E,F,G), (A,C,E), (A,B,C,F) respectively.
Work Step by Step
A node in an electrical circuit is a point at which two or more circuit elements are connected. According to the definition, we have five nodes, one connecting (A,B,C,F), one connecting (B,D), one connecting (D,G), one connecting (E,F,G), and one connecting (A,C,E). Here we should note that the points connecting (A,B) and (C,F) are considered same node, because both are connected by a conductor.
