The purpose of this study is to know about the eligibility and effectivity of magnetic induction practicum tool on solenoid which was accompanied by student's worksheet (LKPD) to explore students conceptual understanding. The method used in this study was ADDIE Developmet Model. Before it used for more, the practicum tool and LKPD must be testedthe feasibility by seven professional Physics teachers as the validator. The student's responses were also used to see the feasibility for the practicum

more »

... tool after the practicum process to be held. Based on result of this study showed that the feasibility for the practicum tool tested by validators got 1.00 and the practicum tool has proper specification to determine the magnetic field on the solenoid. In the form of variation of resemble of turns, current and the length of solenoid. The score of students worksheet got 1.00, so it can conclude that the electromagnetic induction practicum tool on solenoid and students worksheet were in very feasible criteria. The students responses were 0.88 it also very feasible. Gain test result showed that there an increased understanding of students concept after learning using magnetic induction practicum tools of 0.45 and in mastery got 70%. It means in each criteria were at medium. It show that magnetic induction practicum on solenoid can increase the exploring of students conceptual understanding.