Information has been arisen from the learner' mind rather than the external world. Some of this information forming from the resulting individual's relationship with the outside world while another part of the information consists of the individuals owner associated. Learner obtains more concrete information by interacting environment. Mental processes are more active to obtain abstract information. This process is important for the learning of electrical power concept in Science and Technology Education course. Abstraction is one of the method for learning knowledge with using mental processes that cannot be obtained through experiment and observation. RBC model that based on abstraction in the process of creating knowledge, is directly related to mental processes. This study examined the process of abstraction during the learning of electrical power concept by eighth grade students according to RBC model. Clinical interview method was used with four eighth grade students in the study. Three problems related to electrical power concept were used according to RBC model. It has been obtained that students reach the relations to related concept of electrical power in the first two problems and the first part of third problem and they can use this correlation in the third problem as a result of interviews.