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初中物理第二册p.188第(5)题“并联在电路里的两盏电灯L_1和L_2,如果L_1的电阻比L_2的大,那么,通过哪盏灯的电流强度大?在相等的时间里,电流通过哪盏灯所做的功多?哪盏灯更亮些?”第(6)题“串联在电路里的两盏灯L_1和L_2,如果L_1的电阻比L_2的电阻大,那么,哪盏灯两端的电压大?在相等时间里,电流通过哪盏灯所做的功多?哪盏灯更亮些?”以上两题中的“哪盏灯更亮些”,容易引起学生的错觉,认为哪盏灯电流做的功多,这盏灯会更亮些。虽然题目中已说明在相等的时间里,由于初中学生考虑问题不全
Secondary School Physics Book 2 p. 188 (5) “Two lamps L_1 and L_2 connected in parallel in a circuit. If the resistance of L_1 is greater than that of L_2, then which lamp has higher current intensity? At equal time. In which case, the current through which lamp does more work? Which lamp is more bright?” Question (6) “Two lamps connected in series in the circuit L_1 and L_2. If the resistance of L_1 is greater than the resistance of L_2, then Which lamp’s voltage at both ends is high? In the same time, which lamp does more work through which lamp? Which lamp is brighter?“ The above two questions, ”Which lamp is more bright," will easily lead to students. The illusion that the lamp current does more work, this lamp will be brighter. Although the title has stated that in equal time, because junior high school students consider incomplete