DEMONSTRATION TASKS OF ELECTRICAL CURRENT PROPERTIES AND THEIR RATIONAL SENSE

This article reveals the importance of demonstration tasks in physics teaching in secondary schools. The demonstration tasks of electrical current in the gas and their logical analysis is presented and analyzed. Reasoning schemes for giving a logical sense to these physics demo tasks are developed. The proposed reasoning schemes reach to activate students' thinking, understanding the demonstrations during the observed physical phenomena, i.e. help students to: understand the nature of the demo task, determine cause - effect relationships and dependencies, compare conditions and findings, summarize the results, do conclusions. Such using of demonstration tasks is useful to both of teacher and pupil: teacher controls the content of teaching and a learning of pupils, pupils - are focused to self-activities, encouraged to think, analyze, summarize and do conclusions.