Grade 12 Students’ Misconception about Electric Induction

The knowledge of electric induction was to apply in daily life. It is basic knowledge that is used
to describe electricity generation and grounding. However, these contents are difficult to understand
due to the complication of the main point which leads to misconceptions. Therefore, the researcher
then created a conceptual test to survey the understanding of 44 grade 12 students about electric
induction. It contains three questions, which cover 4 topics: 1) the motion of the electric charge when
induced 2) the motion of the electric charge when induction occurs in the electroscope 3) the effect of
earthing in an induced electroscope and 4) the effect of removing the ground wire and the induced object
from the induced electroscope. The results were analyzed by group student responses according to the
level of scientific understanding applied by Haidar. The results of the survey, there was an average number
of students with a sound understanding of 24.3 % and found a large number of students with a
misunderstanding of 49.2 %. Most of the students have mistaken ideas in 2 issues. First, the electric charges
for 86.4%. Second, after grounding, the electroscope is neutral for 84.1%. This study can develop learning
management to scientific concepts and well attitude in studying physics in the future.