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The purpose of this research were 1) to development and find out the efficient experimental apparatus in electric current and magnetic field, 2) to compare the learning achievement between before and after using the experimental apparatus, and 3) to study students’ satisfaction toward their learning using the electric current and magnetic field experimental apparatus. The sample in this study was 90 second year students in general science program, in the second semester of the academic year 2016, Faculty of Education, Bansomdejchaopraya Rajabhat University. The sample was obtained by cluster random sampling, the One-Group Pretest-Posttest design and t–test for dependent sample statistics. The results found that 1) the experimental apparatus had an efficiency of 95/85, which was higher than the criterion 80/80. The overall quality of the experimental apparatus which was assessed by the experts was at a very good level ( = 3.77/4.00), the developed experimental can use for learning management in magnetic force exerting on a current-carrying wire and Ampere’s law efficiently, 2) the students’ learning achievement after using the experimental apparatus, post-test score was higher than the pre-test score at .01 level of significance, and 3) the students’ satisfaction toward their learning using the current and magnetic field experimental apparatus was at a high level ( = 4.21/5.00).
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