在初中物理电学习题中,经常会涉及电路的安全问题,主要包括用电器的安全、电学仪表的安全两大类。在解这类题目时,同学们经常因为考虑不周而出现解题错误。下面就初中物理中常见的电路安全问题的题型,谈一下解题思路和方法。一、电灯的安全每一个电灯,都有它的额定电压和额定电流,如果电压或电流超过了它的额定值,那么,电灯就有可能烧坏,从而引起安全问题。例1将一个标有“6V,6W”字样的电灯L1和一个标有“9V,3W”的电灯L2串联在电路上,求该电路允许的最大电压是多大? Physics in junior high school exercises in the exercises, often involving the safety of the circuit, including the safety of electrical appliances, electrical instrumentation safety two categories. In solving such topics, students often because of poor thinking problems appear error-solving. The following junior high school physics common circuit security issues of the type, talk about the problem-solving ideas and methods. First, the safety of the lamp Each lamp has its rated voltage and current rating, if the voltage or current exceeds its rating, then the lamp may burn out, causing security problems. Example 1 A lamp “L1” labeled “6V, 6W” and a lamp L2 marked “9V, 3W” are connected in series on the circuit. What is the maximum allowable voltage of the circuit?