Kumara, B. A. S.2024-09-132024-09-132010https://ir.lib.pdn.ac.lk/handle/20.500.14444/1035Among the most effective learning methods, active based learning helps students to achieve through knowledge. Especially when teaching Physics, there are more chances to make students active. Demonstration experiments can be used for this purpose. The factors like vast syllabus of Physics, lack of time to be spent to get ready for the experiments, lack of the students’ attendances do not permit to cover all the experiments given. By giving a questionnaire to students as well as Physics teachers, it was identified that electrostatic sub unit is relatively difficult. So the teachers show lukewarm interest to do these experiments. It reduces the problem solving ability in Physics and causes to show much weakness when they are given problems with day to day activities. In this study a set of demonstration experiments were introduced because there are lack of experiments for electrostatic sub unit in the experiment list recommended for A/L Physics syllabus. The demonstrations are aimed at comprehension and application of a general principle to specific instances. The demonstration instruments which are commonly available in school laboratory as well as the low cost materials from the surrounding were utilized. These demonstrations can be used to give a thorough understanding about the concepts in flux lines, repulsive and attractive forces among electrical charges, dielectricity, momentum, action and reaction, equipotential surfaces, as well as the action of the smoke precipitator and the action of the gold leaf, electroscope. They can be used not only for giving knowledge but also for creating pleasant environment in the classroom and enhances student —-teacher interaction.en-USScience educationTeachingG.C.E. A/LThesis